WO2022253284A1 - 药物偶联物及其用途 - Google Patents

药物偶联物及其用途 Download PDF

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Publication number
WO2022253284A1
WO2022253284A1 PCT/CN2022/096690 CN2022096690W WO2022253284A1 WO 2022253284 A1 WO2022253284 A1 WO 2022253284A1 CN 2022096690 W CN2022096690 W CN 2022096690W WO 2022253284 A1 WO2022253284 A1 WO 2022253284A1
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Prior art keywords
formula iii
carbocyclyl
alkyl
independently
amino
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PCT/CN2022/096690
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English (en)
French (fr)
Chinese (zh)
Inventor
汤伟佳
周鑫
梅星星
严辉
李硕旭
范建军
齐学康
俞金泉
李胜峰
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Bio Thera Solutions Ltd
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Bio Thera Solutions Ltd
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Priority to US18/566,371 priority Critical patent/US20240269315A1/en
Priority to JP2023574472A priority patent/JP2024520674A/ja
Priority to EP22815326.8A priority patent/EP4349371A4/en
Priority to CN202280032877.1A priority patent/CN117295524A/zh
Publication of WO2022253284A1 publication Critical patent/WO2022253284A1/zh
Anticipated expiration legal-status Critical
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    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C07K16/2803—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily
    • C07K16/2827—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily against B7 molecules, e.g. CD80, CD86
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
    • C07K2317/73—Inducing cell death, e.g. apoptosis, necrosis or inhibition of cell proliferation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
    • C07K2317/76—Antagonist effect on antigen, e.g. neutralization or inhibition of binding

Definitions

  • the present invention relates to drug conjugates such as antibody drug conjugates, linkers and intermediates for preparing the drug conjugates, and uses of the drug conjugates.
  • Antibody-drug conjugates consist of three parts: antibody, cytotoxic molecule and linker between them (Thomas, A., et al. (2016), Lancet Oncol 17(6):e254-e262). Each of the three has unique functions: antibodies need to specifically bind to tumor cells, cytotoxic molecules need to be sufficiently active and broad-spectrum to tumor cells, linkers need to have unique functionality, be stable in blood circulation, and reach tumors Cells can effectively release cytotoxic molecules (Chari, R.V. (2008), Acc Chem Res 41 (1): 98-107), and the reasonable construction of the three can achieve good clinical effects (Singh, S.K., et al. (2015), Pharm Res 32(11):3541-3571; Hamilton, G.S. (2015), Biologicals 43(5):318-332).
  • One or more embodiments of the present invention provide drug conjugates, which have the structure shown in formula I or its stereoisomers or pharmaceutically acceptable salts or solvates thereof:
  • Abu is a polypeptide, such as an antibody or its antigen-binding unit
  • D is drugs, such as anticancer drugs, cytotoxic drugs, cell differentiation factors, stem cell nutritional factors, steroid drugs, drugs for the treatment of autoimmune diseases, anti-inflammatory drugs or drugs for the treatment of infectious diseases;
  • R is selected from: -(CH 2 ) r -, -(CHR m ) r -, C3-C8 carbocyclyl, -O-(CH 2 ) r -, arylene , -(CH 2 ) r -arylene-, -arylene-(CH 2 )r-, -(CH 2 ) r -(C3-C8 carbocyclyl)-, -(C3-C8 carbocyclyl )-(CH 2 ) r -, C3-C8 heterocyclyl, -(CH 2 ) r -(C3-C8 heterocyclyl)-, -(C3-C8 heterocyclyl)-(CH 2 ) r -, -(CH 2 ) r C(O)NR m (CH 2 ) r -, -(CH 2 CH 2 O) r -, -
  • L is -(AA) i -(FF) f -, wherein, AA is an amino acid or a polypeptide, and i is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20; each FF is independently Wherein each R F is independently C1-C6 alkyl, C1-C6 alkoxy, -NO 2 or halogen; z is 0, 1, 2, 3 or 4; f is 1, 2, 3, 4, 5, 6 , 7, 8, 9 or 10; where * connects to AA, ** connects to D;
  • n is an integer of 1-24, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 or 24;
  • p is 1-10, eg 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.
  • D is an anticancer drug.
  • D is a tubulin inhibitor, a DNA damaging agent, or a DNA topoisomerase inhibitor.
  • the tubulin inhibitor is selected from dolastatins, auristatins, and maytansines.
  • D is auristatin (auristatin), such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • auristatin such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • D is a DNA damaging agent, such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • a DNA damaging agent such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • D is a DNA topoisomerase inhibitor or a salt thereof, such as irinotecan, irinotecan hydrochloride, camptothecin, 9-aminocamptothecin, 9-nitrocamptothecin Camptothecin, 10-hydroxycamptothecin, 9-chloro-10-hydroxycamptothecin, camptothecin derivatives SN-38, 22-hydroxycamptothecin, topotecan, letotecan, belo Tecan, Exitecan, Exitecan Derivatives, Homosilatecan, 6,8-Dibromo-2-methyl-3-[2-(D-xylopyranosylamino) Phenyl]-4(3H)-quinazolinone, 2-cyano-3-(3,4-dihydroxyphenyl)-N-(phenylmethyl)-(2E)-2-acrylamide, 2-cyano-3-(3,4-dihydroxyphenyl)-N
  • the DNA topoisomerase inhibitor is camptothecin, 10-hydroxycamptothecin, topotecan, belotecan, irinotecan, 22-hydroxycamptothecin Or Exitecan, or a salt thereof.
  • D is Tubulysins, taxane drug derivatives, leptomycine derivatives, CC-1065 and its analogs, Amatoxins, splice body inhibitors, benzo (and) diazepines (PBD ) dimers, doxorubicin, methotrexate, vincristine, vinblastine, daunorubicin, mitomycin C, melphalan or chlorambucil derivatives.
  • PBD diazepines
  • D has an amino group or an amino group substituted with an alkyl group, which is linked to FF through an amide bond.
  • D is in
  • X 1 and X 2 are each independently:
  • amino amino substituted by an amino protecting group
  • C1-C6 aminoalkyl optionally substituted by an amino protecting group or C1-C6 alkyl at the amino portion
  • C1-C6 alkyl connected to a heterocycle optionally substituted by one or more C1-C6 alkyl, C1-C6 alkoxy, amino, halogen, nitro or cyano,
  • C1-C6 alkylamino connected to a heterocycle said heterocycle is optionally substituted by C1-C6 alkyl, C1-C6 alkoxy, said amino is optionally substituted by amino protecting group, halogen, nitro, cyano or protecting group substitution,
  • An amino-substituted heterocyclic group which is optionally substituted by a protecting group or one or more C1-C6 alkyl groups at the nitrogen atom of the heterocyclic part or the amino part,
  • Heterocyclic amino which is optionally substituted by a protecting group or a C1-C6 alkyl group at the nitrogen atom of the heterocyclic part or the amino part,
  • a carbamoyl group optionally substituted by a carbamoyl protecting group or a C1-C6 alkyl group,
  • X 3 is C1-C6 alkyl
  • X 4 is H, -(CH 2 ) q -CH 3 , -(CHR n ) q -CH 3 , C3-C8 carbocyclyl, -O-(CH 2 ) q -CH 3 , arylene group -CH 3 , -(CH 2 ) q -arylene-CH 3 , -arylene-(CH 2 ) q -CH 3 , -(CH 2 ) q -(C3-C8 carbocyclyl)-CH 3 , -( C3-C8 carbocyclyl)-(CH 2 ) q -CH 3 , C3-C8 heterocyclyl, -(CH 2 ) q -(C3-C8 heterocyclyl)-CH 3 , -(C3-C8 heterocyclyl base)-(CH 2 ) q -CH 3 , -(CH 2 ) q C(O)NR n (CH 2 )
  • y 0, 1 or 2;
  • Y is O, S or CR 1 R 2 , wherein R 1 and R 2 are each independently H or C1-C6 alkyl;
  • s and t are each independently 0, 1 or 2, but not 0 at the same time.
  • X 4 is H or C1-C6 alkyl.
  • the heterocycle is azetidine, niverazine, morpholine, pyrrolidine, piperidine, imidazole, thiazole, oxazole, or pyridine.
  • the amino protecting group is formyl, acetyl, trityl, tert-butoxycarbonyl, benzyl or p-methoxybenzyloxycarbonyl.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is connected to L.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is connected to L.
  • X 1 and X 2 are each —CH 3 .
  • X and X are each independently F, Cl, Br or I.
  • X and X are each F or Cl.
  • X and X are each F.
  • X 1 and X 2 are each independently —CH 3 , F, or —OH.
  • X 1 and X 2 are each independently F or —CH 3 .
  • X 1 is —CH 3 and X 2 is F.
  • R is -(CH 2 ) r -.
  • R is -(CH 2 ) r -, and r is 1 or 5.
  • each AA is independently selected from the following amino acid or peptide sequences: Val-Cit, Val-Lys, Phe-Lys, Lys-Lys, Ala-Lys, Phe-Cit, Leu-Cit, Ile -Cit, Trp, Cit, Phe-Ala, Phe-Phe-Lys, D-Phe-Phe-Lys, Gly-Phe-Lys, Leu-Ala-Leu, Ile-Ala-Leu, Val-Ala-Val, Ala - Leu-Ala-Leu, ⁇ -Ala-Leu-Ala-Leu and Gly-Phe-Leu-Gly.
  • i 1
  • AA is Val-Cit and i is 1.
  • each FF is independently Where * connects to AA, ** connects to D, wherein each R F is independently C1-C6 alkyl, C1-C6 alkoxy, -NO 2 or halogen.
  • halogen is F.
  • each R F is independently -CH3 , F, -NO2 , or -OCH3 .
  • z is 0.
  • z is 1 or 2.
  • f is 1.
  • each FF is independently Among them, * is connected to AA, and ** is connected to D.
  • f is 1.
  • FF is f is 1, where * is connected to AA and ** is connected to D.
  • L is Where * connects to B, ** connects to D.
  • L is Where * connects to B, ** connects to D.
  • L is Where * connects to B, ** connects to D.
  • G is n is 4-12.
  • n is 4-8.
  • n 4.
  • n 8.
  • p is 2-8.
  • p is 4-8.
  • p is 6-8.
  • p is 7-8.
  • the formula I is:
  • Abu is a polypeptide, such as an antibody or its antigen-binding unit
  • R is selected from: -(CH 2 ) r -, -(CHR m )r-, C3-C8 carbocyclyl, -O-(CH 2 ) r -, arylene, -(CH 2 ) r -arylene Base-, -arylene-(CH 2 )r-, -(CH 2 ) r -(C3-C8 carbocyclyl)-, -(C3-C8 carbocyclyl)-(CH 2 ) r -, C3 -C8 heterocyclyl, -(CH 2 ) r -(C3-C8 heterocyclyl)-, -(C3-C8 heterocyclyl)-(CH 2 ) r -, -(CH 2 ) r C(O) NR m (CH 2 ) r -, -(CH 2 CH 2 O) r -, -(CH 2 CH 2 O) r -CH 2 -
  • D is drugs, such as anticancer drugs, cytotoxic drugs, cell differentiation factors, stem cell nutritional factors, steroid drugs, drugs for the treatment of autoimmune diseases, anti-inflammatory drugs or drugs for the treatment of infectious diseases;
  • n is an integer of 1-24, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23 or 24;
  • p is 1-10, eg 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.
  • D is a tubulin inhibitor, a DNA damaging agent, or a DNA topoisomerase inhibitor.
  • the tubulin inhibitor is selected from dolastatin, auristatins and maytansines.
  • D is auristatin (auristatin), such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • auristatin such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • D is a DNA damaging agent, such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • a DNA damaging agent such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • D is a DNA topoisomerase inhibitor or a salt thereof, such as irinotecan, irinotecan hydrochloride, camptothecin, 9-aminocamptothecin, 9-nitrocamptothecin Camptothecin, 10-hydroxycamptothecin, 9-chloro-10-hydroxycamptothecin, camptothecin derivatives SN-38, 22-hydroxycamptothecin, topotecan, letotecan, belo Tecan, Exitecan, Homosilatecan, 6,8-Dibromo-2-methyl-3-[2-(D-xylopyranosylamino)phenyl]-4(3H )-quinazolone, 2-cyano-3-(3,4-dihydroxyphenyl)-N-(phenylmethyl)-(2E)-2-acrylamide, 2-cyano-3- (3,4-dihydroxyphenyl)-N-(3-hydroxyphenylpropy
  • the DNA topoisomerase inhibitor is camptothecin, 10-hydroxycamptothecin, topotecan, belotecan, irinotecan, 22-hydroxycamptothecin Or Exitecan, or a salt thereof.
  • D is Tubulysins, taxane drug derivatives, leptomycine derivatives, CC-1065 and its analogs, Amatoxins, splice body inhibitors, benzo (and) diazepines (PBD ) dimers, doxorubicin, methotrexate, vincristine, vinblastine, daunorubicin, mitomycin C, melphalan, or chlorambucil derivatives.
  • PBD diazepines
  • D is in
  • X 1 and X 2 are each independently:
  • amino amino substituted by an amino protecting group
  • C1-C6 aminoalkyl optionally substituted by an amino protecting group or C1-C6 alkyl at the amino portion
  • C1-C6 alkyl connected to a heterocycle optionally substituted by one or more C1-C6 alkyl, C1-C6 alkoxy, amino, halogen, nitro or cyano,
  • C1-C6 alkylamino connected to a heterocycle said heterocycle is optionally substituted by C1-C6 alkyl, C1-C6 alkoxy, said amino is optionally substituted by amino protecting group, halogen, nitro, cyano or protecting group substitution,
  • An amino-substituted heterocyclic group which is optionally substituted by a protecting group or one or more C1-C6 alkyl groups at the nitrogen atom of the heterocyclic part or the amino part,
  • Heterocyclic amino which is optionally substituted by a protecting group or a C1-C6 alkyl group at the nitrogen atom of the heterocyclic part or the amino part,
  • a carbamoyl group optionally substituted by a carbamoyl protecting group or a C1-C6 alkyl group,
  • X 3 is C1-C6 alkyl
  • X 4 is H, -(CH 2 ) q -CH 3 , -(CHR n ) q -CH 3 , C3-C8 carbocyclyl, -O-(CH 2 ) q -CH 3 , arylene group -CH 3 , -(CH 2 ) q -arylene-CH 3 , -arylene-(CH 2 ) q -CH 3 , -(CH 2 ) q -(C3-C8 carbocyclyl)-CH 3 , -( C3-C8 carbocyclyl)-(CH 2 ) q -CH 3 , C3-C8 heterocyclyl, -(CH 2 ) q -(C3-C8 heterocyclyl)-CH 3 , -(C3-C8 heterocyclyl base)-(CH 2 ) q -CH 3 , -(CH 2 ) q C(O)NR n (CH 2 )
  • y 0, 1 or 2;
  • Y is O, S or CR 1 R 2 , wherein R 1 and R 2 are each independently H or C1-C6 alkyl;
  • s and t are each independently 0, 1 or 2, but not 0 at the same time.
  • X 4 is H or C1-C6 alkyl.
  • the heterocycle is azetidine, acetalzine, morpholine, pyrrolidine, piperidine, imidazole, thiazole, oxazole or pyridine.
  • the amino protecting group is formyl, acetyl, trityl, tert-butoxycarbonyl, benzyl or p-methoxybenzyloxycarbonyl.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • X 1 and X 2 are each —CH 3 .
  • X and X are each independently F, Cl, Br or I.
  • X and X are each F.
  • X 1 and X 2 are each independently —CH 3 , F, or —OH.
  • X 1 and X 2 are each independently F or —CH 3 .
  • X 1 is —CH 3 and X 2 is F.
  • R is -(CH 2 ) r -.
  • R is -(CH 2 ) r -, and r is 1 or 5.
  • n is 4-12.
  • n is 4-8.
  • n 4.
  • n 8.
  • p is 2-8.
  • p is 4-8.
  • p is 6-8.
  • p is 7-8.
  • the formula I is:
  • Abu is a polypeptide, such as an antibody or its antigen-binding unit
  • R is selected from: -(CH 2 ) r -, -(CHR m )r-, C3-C8 carbocyclyl, -O-(CH 2 ) r -, arylene, -(CH 2 ) r -arylene Base-, -arylene-(CH 2 )r-, -(CH 2 ) r -(C3-C8 carbocyclyl)-, -(C3-C8 carbocyclyl)-(CH 2 ) r -, C3 -C8 heterocyclyl, -(CH 2 ) r -(C3-C8 heterocyclyl)-, -(C3-C8 heterocyclyl)-(CH 2 ) r -, -(CH 2 ) r C(O) NR m (CH 2 ) r -, -(CH 2 CH 2 O) r -, -(CH 2 CH 2 O) r -CH 2 -
  • D is drugs, such as anticancer drugs, cytotoxic drugs, cell differentiation factors, stem cell nutritional factors, steroid drugs, drugs for the treatment of autoimmune diseases, anti-inflammatory drugs or drugs for the treatment of infectious diseases;
  • n is an integer of 1-24, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23 or 24;
  • p is 1-10, eg 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.
  • D is a tubulin inhibitor, a DNA damaging agent, or a DNA topoisomerase inhibitor.
  • the tubulin inhibitor is selected from dolastatins, auristatins, and maytansines.
  • D is auristatin (auristatin), such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • auristatin such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • D is a DNA damaging agent, such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • a DNA damaging agent such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • D is a DNA topoisomerase inhibitor or a salt thereof, such as irinotecan, irinotecan hydrochloride, camptothecin, 9-aminocamptothecin, 9-nitrocamptothecin Camptothecin, 10-hydroxycamptothecin, 9-chloro-10-hydroxycamptothecin, camptothecin derivatives SN-38, 22-hydroxycamptothecin, topotecan, letotecan, belo Tecan, Exitecan, Homosilatecan, 6,8-Dibromo-2-methyl-3-[2-(D-xylopyranosylamino)phenyl]-4(3H )-quinazolone, 2-cyano-3-(3,4-dihydroxyphenyl)-N-(phenylmethyl)-(2E)-2-acrylamide, 2-cyano-3- (3,4-dihydroxyphenyl)-N-(3-hydroxyphenylpropy
  • the DNA topoisomerase inhibitor is camptothecin, 10-hydroxycamptothecin, topotecan, belotecan, irinotecan, 22-hydroxycamptothecin Or Exitecan, or a salt thereof.
  • D is Tubulysins, taxane drug derivatives, leptomycine derivatives, CC-1065 and its analogs, Amatoxins, splice body inhibitors, benzo (and) diazepines (PBD ) dimers, doxorubicin, methotrexate, vincristine, vinblastine, daunorubicin, mitomycin C, melphalan, or chlorambucil derivatives.
  • PBD diazepines
  • D is
  • X 1 and X 2 are each independently:
  • amino amino substituted by an amino protecting group
  • C1-C6 aminoalkyl optionally substituted by an amino protecting group or C1-C6 alkyl at the amino portion
  • C1-C6 alkyl connected to a heterocycle optionally substituted by one or more C1-C6 alkyl, C1-C6 alkoxy, amino, halogen, nitro or cyano,
  • C1-C6 alkylamino connected to a heterocycle said heterocycle is optionally substituted by C1-C6 alkyl, C1-C6 alkoxy, said amino is optionally substituted by amino protecting group, halogen, nitro, cyano or protecting group substitution,
  • An amino-substituted heterocyclic group which is optionally substituted by a protecting group or one or more C1-C6 alkyl groups at the nitrogen atom of the heterocyclic part or the amino part,
  • Heterocyclic amino which is optionally substituted by a protecting group or a C1-C6 alkyl group at the nitrogen atom of the heterocyclic part or the amino part,
  • a carbamoyl group optionally substituted by a carbamoyl protecting group or a C1-C6 alkyl group,
  • X 3 is C1-C6 alkyl
  • X 4 is H, -(CH 2 ) q -CH 3 , -(CHR n ) q -CH 3 , C3-C8 carbocyclyl, -O-(CH 2 ) q -CH 3 , arylene group -CH 3 , -(CH 2 ) q -arylene-CH 3 , -arylene-(CH 2 ) q -CH 3 , -(CH 2 ) q -(C3-C8 carbocyclyl)-CH 3 , -( C3-C8 carbocyclyl)-(CH 2 ) q -CH 3 , C3-C8 heterocyclyl, -(CH 2 ) q -(C3-C8 heterocyclyl)-CH 3 , -(C3-C8 heterocyclyl base)-(CH 2 ) q -CH 3 , -(CH 2 ) q C(O)NR n (CH 2 )
  • y 0, 1 or 2;
  • Y is O, S or CR 1 R 2 , wherein R 1 and R 2 are each independently H or C1-C6 alkyl;
  • s and t are each independently 0, 1 or 2, but not 0 at the same time.
  • X 4 is H or C1-C6 alkyl.
  • the heterocycle is azetidine, acetalzine, morpholine, pyrrolidine, piperidine, imidazole, thiazole, oxazole or pyridine.
  • the amino protecting group is formyl, acetyl, trityl, tert-butoxycarbonyl, benzyl or p-methoxybenzyloxycarbonyl.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • X 1 and X 2 are each —CH 3 .
  • X and X are each independently F, Cl, Br or I.
  • X and X are each F.
  • X 1 and X 2 are each independently —CH 3 , F, or —OH.
  • X 1 and X 2 are each independently F or —CH 3 .
  • X 1 is —CH 3 and X 2 is F.
  • R is -(CH 2 ) r -.
  • R is -(CH 2 ) r -, and r is 1 or 5.
  • n is 4-12.
  • n is 4-8.
  • n 4.
  • n 8.
  • p is 2-8.
  • p is 4-8.
  • p is 6-8.
  • p is 7-8.
  • the formula I is:
  • Abu is a polypeptide, such as an antibody or its antigen-binding unit
  • D is drugs, such as anticancer drugs, cytotoxic drugs, cell differentiation factors, stem cell nutritional factors, steroid drugs, drugs for the treatment of autoimmune diseases, anti-inflammatory drugs or drugs for the treatment of infectious diseases;
  • n is an integer of 1-24, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23 or 24;
  • p is 1-10, eg 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.
  • Abu is a polypeptide, such as an antibody or its antigen-binding unit
  • D is drugs, such as anticancer drugs, cytotoxic drugs, cell differentiation factors, stem cell nutritional factors, steroid drugs, drugs for the treatment of autoimmune diseases, anti-inflammatory drugs or drugs for the treatment of infectious diseases;
  • n is an integer of 1-24, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23 or 24;
  • p is 1-10, eg 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.
  • D is a tubulin inhibitor, a DNA damaging agent, or a DNA topoisomerase inhibitor.
  • the tubulin inhibitor is selected from dolastatins, auristatins, and maytansines.
  • D is auristatin (auristatin), such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • auristatin such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • D is a DNA damaging agent, such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, Aza), DNA topoisomerase inhibitors.
  • a DNA damaging agent such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, Aza), DNA topoisomerase inhibitors.
  • D is a DNA topoisomerase inhibitor or a salt thereof, such as irinotecan, irinotecan hydrochloride, camptothecin, 9-aminocamptothecin, 9-nitrocamptothecin Camptothecin, 10-hydroxycamptothecin, 9-chloro-10-hydroxycamptothecin, camptothecin derivatives SN-38, 22-hydroxycamptothecin, topotecan, letotecan, belo Tecan, Exitecan, Homosilatecan, 6,8-Dibromo-2-methyl-3-[2-(D-xylopyranosylamino)phenyl]-4(3H )-quinazolone, 2-cyano-3-(3,4-dihydroxyphenyl)-N-(phenylmethyl)-(2E)-2-acrylamide, 2-cyano-3- (3,4-dihydroxyphenyl)-N-(3-hydroxyphenylpropy
  • the DNA topoisomerase inhibitor is camptothecin, 10-hydroxycamptothecin, topotecan, belotecan, irinotecan, 22-hydroxycamptothecin Or Exitecan, or a salt thereof.
  • D is Tubulysins, taxane drug derivatives, leptomycine derivatives, CC-1065 and its analogs, Amatoxins, splice body inhibitors, benzo (and) diazepines (PBD ) dimers, doxorubicin, methotrexate, vincristine, vinblastine, daunorubicin, mitomycin C, melphalan, or chlorambucil derivatives.
  • PBD diazepines
  • D is in
  • X 1 and X 2 are each independently:
  • amino amino substituted by an amino protecting group
  • C1-C6 aminoalkyl optionally substituted by an amino protecting group or C1-C6 alkyl at the amino portion
  • C1-C6 alkyl connected to a heterocycle optionally substituted by one or more C1-C6 alkyl, C1-C6 alkoxy, amino, halogen, nitro or cyano,
  • C1-C6 alkylamino connected to a heterocycle said heterocycle is optionally substituted by C1-C6 alkyl, C1-C6 alkoxy, said amino is optionally substituted by amino protecting group, halogen, nitro, cyano or protecting group substitution,
  • An amino-substituted heterocyclic group which is optionally substituted by a protecting group or one or more C1-C6 alkyl groups at the nitrogen atom of the heterocyclic part or the amino part,
  • Heterocyclic amino which is optionally substituted by a protecting group or a C1-C6 alkyl group at the nitrogen atom of the heterocyclic part or the amino part,
  • a carbamoyl group optionally substituted by a carbamoyl protecting group or a C1-C6 alkyl group,
  • X 3 is C1-C6 alkyl
  • X 4 is H, -(CH 2 ) q -CH 3 , -(CHR n ) q -CH 3 , C3-C8 carbocyclyl, -O-(CH 2 ) q -CH 3 , arylene group -CH 3 , -(CH 2 ) q -arylene-CH 3 , -arylene-(CH 2 ) q -CH 3 , -(CH 2 ) q -(C3-C8 carbocyclyl)-CH 3 , -( C3-C8 carbocyclyl)-(CH 2 ) q -CH 3 , C3-C8 heterocyclyl, -(CH 2 ) q -(C3-C8 heterocyclyl)-CH 3 , -(C3-C8 heterocyclyl base)-(CH 2 ) q -CH 3 , -(CH 2 ) q C(O)NR n (CH 2 )
  • y 0, 1 or 2;
  • Y is O, S or CR 1 R 2 , wherein R 1 and R 2 are each independently H or C1-C6 alkyl;
  • s and t are each independently 0, 1 or 2, but not 0 at the same time.
  • X 4 is H or C1-C6 alkyl.
  • the heterocycle is azetidine, acetalzine, morpholine, pyrrolidine, piperidine, imidazole, thiazole, oxazole or pyridine.
  • the amino protecting group is formyl, acetyl, trityl, tert-butoxycarbonyl, benzyl or p-methoxybenzyloxycarbonyl.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • X 1 and X 2 are each —CH 3 .
  • X and X are each independently F, Cl, Br or I.
  • X and X are each F.
  • X 1 and X 2 are each independently —CH 3 , F, or —OH.
  • X 1 and X 2 are each independently F or —CH 3 .
  • X 1 is —CH 3 and X 2 is F.
  • n is 4-12.
  • n is 4-8.
  • n 4.
  • n 8.
  • p is 2-8.
  • p is 4-8.
  • p is 6-8.
  • p is 7-8.
  • the formula I is:
  • Abu is a polypeptide, such as an antibody or its antigen-binding unit
  • D is drugs, such as anticancer drugs, cytotoxic drugs, cell differentiation factors, stem cell nutritional factors, steroid drugs, drugs for the treatment of autoimmune diseases, anti-inflammatory drugs or drugs for the treatment of infectious diseases;
  • p is 1-10, eg 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.
  • D is a tubulin inhibitor, a DNA damaging agent, or a DNA topoisomerase inhibitor.
  • the tubulin inhibitor is selected from dolastatins, auristatins, and maytansines.
  • D is auristatin (auristatin), such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • auristatin such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • D is a DNA damaging agent, such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • a DNA damaging agent such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • D is a DNA topoisomerase inhibitor or a salt thereof, such as irinotecan, irinotecan hydrochloride, camptothecin, 9-aminocamptothecin, 9-nitrocamptothecin Camptothecin, 10-hydroxycamptothecin, 9-chloro-10-hydroxycamptothecin, camptothecin derivatives SN-38, 22-hydroxycamptothecin, topotecan, letotecan, belo Tecan, Exitecan, Homosilatecan, 6,8-Dibromo-2-methyl-3-[2-(D-xylopyranosylamino)phenyl]-4(3H )-quinazolone, 2-cyano-3-(3,4-dihydroxyphenyl)-N-(phenylmethyl)-(2E)-2-acrylamide, 2-cyano-3- (3,4-dihydroxyphenyl)-N-(3-hydroxyphenylpropy
  • the DNA topoisomerase inhibitor is camptothecin, 10-hydroxycamptothecin, topotecan, belotecan, irinotecan, 22-hydroxycamptothecin Or Exitecan, or a salt thereof.
  • D is Tubulysins, taxane drug derivatives, leptomycine derivatives, CC-1065 and its analogs, Amatoxins, splice body inhibitors, benzo (and) diazepines (PBD ) dimers, doxorubicin, methotrexate, vincristine, vinblastine, daunorubicin, mitomycin C, melphalan, or chlorambucil derivatives.
  • PBD diazepines
  • D is in
  • X 1 and X 2 are each independently:
  • amino amino substituted by an amino protecting group
  • C1-C6 aminoalkyl optionally substituted by an amino protecting group or C1-C6 alkyl at the amino portion
  • C1-C6 alkyl connected to a heterocycle optionally substituted by one or more C1-C6 alkyl, C1-C6 alkoxy, amino, halogen, nitro or cyano,
  • C1-C6 alkylamino connected to a heterocycle said heterocycle is optionally substituted by C1-C6 alkyl, C1-C6 alkoxy, said amino is optionally substituted by amino protecting group, halogen, nitro, cyano or protecting group substitution,
  • An amino-substituted heterocyclic group which is optionally substituted by a protecting group or one or more C1-C6 alkyl groups at the nitrogen atom of the heterocyclic part or the amino part,
  • Heterocyclic amino which is optionally substituted by a protecting group or a C1-C6 alkyl group at the nitrogen atom of the heterocyclic part or the amino part,
  • a carbamoyl group optionally substituted by a carbamoyl protecting group or a C1-C6 alkyl group,
  • X 3 is C1-C6 alkyl
  • X 4 is H, -(CH 2 ) q -CH 3 , -(CHR n ) q -CH 3 , C3-C8 carbocyclyl, -O-(CH 2 ) q -CH 3 , arylene group -CH 3 , -(CH 2 ) q -arylene-CH 3 , -arylene-(CH 2 ) q -CH 3 , -(CH 2 ) q -(C3-C8 carbocyclyl)-CH 3 , -( C3-C8 carbocyclyl)-(CH 2 ) q -CH 3 , C3-C8 heterocyclyl, -(CH 2 ) q -(C3-C8 heterocyclyl)-CH 3 , -(C3-C8 heterocyclyl base)-(CH 2 ) q -CH 3 , -(CH 2 ) q C(O)NR n (CH 2 )
  • y 0, 1 or 2;
  • Y is O, S or CR 1 R 2 , wherein R 1 and R 2 are each independently H or C1-C6 alkyl;
  • s and t are each independently 0, 1 or 2, but not 0 at the same time.
  • X 4 is H or C1-C6 alkyl.
  • the heterocycle is azetidine, acetalzine, morpholine, pyrrolidine, piperidine, imidazole, thiazole, oxazole or pyridine.
  • the amino protecting group is formyl, acetyl, trityl, tert-butoxycarbonyl, benzyl or p-methoxybenzyloxycarbonyl.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • X 1 and X 2 are each —CH 3 .
  • X and X are each independently F, Cl, Br or I.
  • X and X are each F.
  • X 1 and X 2 are each independently —CH 3 , F, or —OH.
  • X 1 and X 2 are each independently F or —CH 3 .
  • X 1 is —CH 3 and X 2 is F.
  • p is 2-8.
  • p is 4-8.
  • p is 6-8.
  • p is 7-8.
  • the formula I is:
  • Abu is a drug, such as an antibody or its antigen-binding unit
  • p is 1-10, eg 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.
  • Abu is a polypeptide containing cysteine in its sequence, and is connected to other parts of the drug conjugate (such as M in formula I) through the sulfur atom of cysteine.
  • Abu is an Fc region-containing polypeptide. In one or more embodiments, Abu is linked to other parts of the drug conjugate (such as M in formula I) through the Fc region.
  • the target of Abu binding is selected from: HER2, TROP-2, Nection-4, B7H3, B7H4, CLDN18, BMPR1B, E16, STEAP1, 0772P, MPF, Napi3b, Sema5b, PSCAhlg, ETBR , MSG783, STEAP2, TrpM4, CRIPTO, CD20, CD21, CD22, CD30, FcRH2, NCA, MDP, IL20R ⁇ , Brevican, EphB2R, ASLG659, PSCA, GEDA, BAFF-R, CD79a, CD79b, CXCR5 , HLA-DOB, P2X5, CD72, LY64, FcRH1, IRTA2, TENB2, PMEL17, TMEFF1, GDNF-Ra1, Ly6E, TMEM46, Ly6G6D, LGR5, RET, LY6K, GPR19, GPR54, ASPHD1, Tyrosinase
  • the target of Abu binding is HER2, TROP-2, CLDN18.2, B7H3 or FR ⁇ .
  • Abu is an antibody or an antigen-binding unit thereof, and the drug conjugate is an antibody drug conjugate.
  • Abu is an antibody comprising an Fc region or an antigen-binding unit thereof.
  • the Fc region is a human IgG1, IgG2, IgG3 or IgG4 Fc region.
  • Abu is linked to other parts of the drug conjugate (such as M in formula I) through the Fc region.
  • Abu is a single domain antibody.
  • Abu is a Fab fragment.
  • Abu is a single chain antibody.
  • Abu is a whole antibody.
  • Abu is an anti-HER2 antibody, an anti-Trop2 antibody, an anti-CLDN18.2 antibody, an anti-B7H3 antibody, or an anti-FR ⁇ antibody.
  • Abu is an anti-HER2 monoclonal antibody, an anti-Trop2 monoclonal antibody, an anti-CLDN18.2 monoclonal antibody, an anti-B7H3 monoclonal antibody, or an anti-FR ⁇ monoclonal antibody.
  • Abu is Trastuzumab, Pertuzumab, Panitumumab, Nimotuzumab, Matuzumab, Rituximab, or Cetuximab.
  • Abu is an anti-CLDN18.2 antibody or an antigen-binding unit thereof, and the anti-CLDN18.2 antibody or an antigen-binding unit thereof comprises one or more of (a)-(f), wherein :
  • VH CDR1 comprising or consisting of the amino acid sequence shown in SEQ ID NO:7;
  • VH CDR2 comprising or consisting of the amino acid sequence shown in SEQ ID NO:8;
  • VH CDR3 comprising or consisting of the amino acid sequence shown in SEQ ID NO:9;
  • VL CDR1 comprising or consisting of the amino acid sequence shown in SEQ ID NO:10;
  • VL CDR2 it comprises the aminoacid sequence shown in SEQ ID NO:11 or is made up of;
  • VL CDR3 which comprises the amino acid sequence shown in SEQ ID NO: 12 or consists of it.
  • the anti-CLDN18.2 antibody or an antigen-binding unit thereof comprises the following CDRs:
  • VH CDR1 comprising or consisting of the amino acid sequence shown in SEQ ID NO:7;
  • VH CDR2 comprising or consisting of the amino acid sequence shown in SEQ ID NO:8;
  • VH CDR3 comprising or consisting of the amino acid sequence shown in SEQ ID NO:9;
  • VL CDR1 comprising or consisting of the amino acid sequence shown in SEQ ID NO:10;
  • VL CDR2 it comprises the aminoacid sequence shown in SEQ ID NO:11 or is made up of;
  • VL CDR3 which comprises the amino acid sequence shown in SEQ ID NO: 12 or consists of it.
  • the anti-CLDN18.2 antibody or its antigen binding unit comprises VH CDR1 shown in SEQ ID NO:7, VH CDR2 shown in SEQ ID NO:8, VH CDR2 shown in SEQ ID NO VH CDR3 shown in :9, VL CDR1 shown in SEQ ID NO:10, VL CDR2 shown in SEQ ID NO:11 and VLCDR3 shown in SEQ ID NO:12.
  • the anti-CLDN18.2 antibody or an antigen binding unit thereof comprises a heavy chain variable region and a light chain variable region; wherein the heavy chain variable region comprises as shown in SEQ ID NO: 13 The sequence shown, or a sequence having at least 90% identity compared to the sequence shown in SEQ ID NO: 13, or an amino acid sequence with one or more conservative amino acid substitutions compared to the sequence shown in SEQ ID NO: 13; and / or
  • the light chain variable region comprises a sequence as shown in SEQ ID NO: 14, or a sequence having at least 90% identity compared with the sequence shown in SEQ ID NO: 14, or a sequence similar to the sequence shown in SEQ ID NO: 14 Amino acid sequences having one or more conservative amino acid substitutions.
  • the anti-CLDN18.2 antibody or antigen-binding fragment thereof comprises a heavy chain constant region comprising the amino acid sequence shown in SEQ ID NO: 15 or 16.
  • the anti-CLDN18.2 antibody or antigen-binding fragment thereof comprises a light chain constant region comprising the amino acid sequence shown in SEQ ID NO:17.
  • the anti-CLDN18.2 antibody or antigen-binding fragment thereof comprises a heavy chain constant region and a light chain constant region, and the heavy chain constant region comprises an amino acid sequence as shown in SEQ ID NO: 15 ;
  • the light chain constant region comprises the amino acid sequence shown in SEQ ID NO: 17.
  • the anti-CLDN18.2 antibody or antigen-binding fragment thereof comprises a heavy chain constant region and a light chain constant region, and the heavy chain constant region comprises an amino acid sequence as shown in SEQ ID NO: 16 ;
  • the light chain constant region comprises the amino acid sequence shown in SEQ ID NO: 17.
  • the anti-CLDN18.2 antibody is the H239H-2b-K-6a-1 antibody
  • the amino acid sequence of the heavy chain variable region is shown in SEQ ID NO: 13
  • the amino acid sequence of the heavy chain constant region The sequence is shown in SEQ ID NO:15
  • the amino acid sequence of the light chain variable region is shown in SEQ ID NO:14
  • the amino acid sequence of the light chain constant region is shown in SEQ ID NO:17.
  • the antibody is H239H-2b-K-6a-2 antibody
  • the amino acid sequence of its heavy chain variable region is shown in SEQ ID NO: 13
  • the amino acid sequence of its heavy chain constant region is shown in SEQ ID NO:16
  • the amino acid sequence of the light chain variable region is shown in SEQ ID NO:14
  • the amino acid sequence of the light chain constant region is shown in SEQ ID NO:17.
  • the antibody comprises a sequence that is at least 80% identical to the H239H-2b-K-6a-1 antibody, or has a sequence that is at least 80% identical to the H239H-2b-K-6a-1 antibody Amino acid sequence with one or more conservative amino acid substitutions. In one or more embodiments, the antibody comprises a sequence that is at least 80% identical to the H239H-2b-K-6a-2 antibody, or has a sequence that is at least 80% identical to the H239H-2b-K-6a-2 antibody Amino acid sequence with one or more conservative amino acid substitutions. In one or more embodiments, Abu is the H239H-2b-K-6a-1 antibody, wherein the light chain amino acid sequence of the antibody is shown in SEQ ID NO: 20, and the heavy chain amino acid sequence is shown in SEQ ID NO: 18 shown.
  • Abu is the H239H-2b-K-6a-2 antibody, wherein the light chain amino acid sequence of the antibody is shown in SEQ ID NO: 20, and the heavy chain amino acid sequence is shown in SEQ ID NO: 19 shown.
  • Abu is an anti-B7H3 antibody or an antigen binding unit thereof.
  • the heavy chain amino acid sequence of the anti-B7H3 antibody is shown in SEQ ID NO:21, and the light chain amino acid sequence is shown in SEQ ID NO:22.
  • Abu is an anti-FR ⁇ antibody or an antigen binding unit thereof.
  • the heavy chain amino acid sequence of the anti-FR ⁇ antibody is shown in SEQ ID NO:23, and the light chain amino acid sequence is shown in SEQ ID NO:24.
  • the antibody comprises a sequence that is at least 80% identical to any of the antibodies described above, or an amino acid sequence that has one or more conservative amino acid substitutions compared to any of the antibodies described above.
  • p is 2-8.
  • p is 4-8.
  • p is 6-8.
  • p is 7-8.
  • One or more embodiments provide a linker precursor for forming a drug conjugate, such as an antibody drug conjugate, which is a compound of formula II or a stereoisomer thereof or a pharmaceutically acceptable salt or solvate thereof thing:
  • R is selected from: -(CH 2 ) r -, -(CHR m )r-, C3-C8 carbocyclyl, -O-(CH 2 ) r -, arylene, -(CH 2 ) r -, arylene group-, -arylene group-(CH 2 ) r-, -(CH 2 ) r -(C3-C8 carbocyclyl)-, -(C3-C8 carbocyclyl)-(CH 2 ) r -, C3-C8 heterocyclyl, -(CH 2 ) r -(C3-C8 heterocyclyl)-, -(C3-C8 heterocyclyl)-(CH 2 ) r -, -(CH 2 ) r C(O)NR m (CH 2 ) r -, -(CH 2 CH 2 O) r -, -(CH 2
  • L' is -(AA) i -(FF') f -, wherein, AA is an amino acid or a polypeptide, and i is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20; each FF' is independently Wherein each R F is independently C1-C6 alkyl, C1-C6 alkoxy, -NO 2 or halogen; z is 0, 1, 2, 3 or 4; f is 1, 2, 3, 4, 5, 6 , 7, 8, 9 or 10; where * is connected to AA;
  • n is 1-24, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 or 24.
  • R is -(CH 2 ) r -.
  • R is -(CH 2 ) r -, and r is 1 or 5.
  • each AA is independently selected from the following amino acid or peptide sequences: Val-Cit, Val-Lys, Phe-Lys, Lys-Lys, Ala-Lys, Phe-Cit, Leu-Cit, Ile- Cit, Trp, Cit, Phe-Ala, Phe-Phe-Lys, D-Phe-Phe-Lys, Gly-Phe-Lys, Leu-Ala-Leu, Ile-Ala-Leu, Val-Ala-Val, Ala- Leu-Ala-Leu, ⁇ -Ala-Leu-Ala-Leu and Gly-Phe-Leu-Gly.
  • i 1
  • AA is Val-Cit and i is 1.
  • each FF' is independently wherein * connects AA; wherein each R F is independently C1-C6 alkyl, C1-C6 alkoxy, -NO 2 or halogen.
  • R F is F.
  • z is 0.
  • z is 1 or 2.
  • f is 1.
  • B is Among them, * is connected to M', ** is connected to L', and *** is connected to G.
  • each FF' is independently where * is connected to AA.
  • f is 1.
  • FF' is f is 1, where * connects AA.
  • L' is where * connects to B.
  • L' is where * connects to B.
  • L' is where * connects to B.
  • R is -(CH 2 ) r -.
  • R is -(CH 2 ) r -, and r is 1 or 5.
  • n is 4-12.
  • n is 4-8.
  • n 4.
  • n 8.
  • the formula II is:
  • R is selected from: -(CH 2 ) r -, -(CHR m )r-, C3-C8 carbocyclyl, -O-(CH 2 ) r -, arylene, -(CH 2 ) r -arylene Base-, -arylene-(CH 2 )r-, -(CH 2 ) r -(C3-C8 carbocyclyl)-, -(C3-C8 carbocyclyl)-(CH 2 ) r -, C3 -C8 heterocyclyl, -(CH 2 ) r -(C3-C8 heterocyclyl)-, -(C3-C8 heterocyclyl)-(CH 2 ) r -, -(CH 2 ) r C(O) NR m (CH 2 ) r -, -(CH 2 CH 2 O) r -, -(CH 2 CH 2 O) r -CH 2 -
  • n is an integer of 1-24, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23 or 24.
  • R is -(CH 2 ) r -.
  • R is -(CH 2 ) r -, and r is 1 or 5.
  • n is 4-12.
  • n is 4-8.
  • n 4.
  • n 8.
  • the formula II is:
  • R is selected from: -(CH 2 ) r -, -(CHR m )r-, C3-C8 carbocyclyl, -O-(CH 2 ) r -, arylene, -(CH 2 ) r -arylene Base-, -arylene-(CH 2 )r-, -(CH 2 ) r -(C3-C8 carbocyclyl)-, -(C3-C8 carbocyclyl)-(CH 2 ) r -, C3 -C8 heterocyclyl, -(CH 2 ) r -(C3-C8 heterocyclyl)-, -(C3-C8 heterocyclyl)-(CH 2 ) r -, -(CH 2 ) r C(O) NR m (CH 2 ) r -, -(CH 2 CH 2 O) r -, -(CH 2 CH 2 O) r -CH 2 -
  • n is an integer of 1-24, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23 or 24.
  • R is -(CH 2 ) r -.
  • R is -(CH 2 ) r -, and r is 1 or 5.
  • n is 4-12.
  • n is 4-8.
  • n 4.
  • n 8.
  • the formula II is:
  • n is an integer of 1-24, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 or 24.
  • n is 4-12.
  • n is 4-8.
  • n 4.
  • n 8.
  • the formula II is:
  • n is an integer of 1-24, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 or 24.
  • n is 4-12.
  • n is 4-8.
  • n 4.
  • n 8.
  • Formula II has the following structure:
  • One or more embodiments provide an intermediate for forming a drug conjugate, such as an antibody drug conjugate, which is a compound of formula III or a stereoisomer thereof or a pharmaceutically acceptable salt or solvate thereof:
  • D is drugs, such as anticancer drugs, cytotoxic drugs, cell differentiation factors, stem cell nutritional factors, steroid drugs, drugs for the treatment of autoimmune diseases, anti-inflammatory drugs or drugs for the treatment of infectious diseases;
  • R is selected from: -(CH 2 ) r -, -(CHR m )r-, C3-C8 carbocyclyl, -O-(CH 2 ) r -, arylene, -(CH 2 ) r -, arylene group-, -arylene group-(CH 2 ) r-, -(CH 2 ) r -(C3-C8 carbocyclyl)-, -(C3-C8 carbocyclyl)-(CH 2 ) r -, C3-C8 heterocyclyl, -(CH 2 ) r -(C3-C8 heterocyclyl)-, -(C3-C8 heterocyclyl)-(CH 2 ) r -, -(CH 2 ) r C(O)NR m (CH 2 ) r -, -(CH 2 CH 2 O) r -, -(CH 2
  • L is -(AA) i -(FF) f -, wherein, AA is an amino acid or a polypeptide, and i is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20; each FF is independently Wherein each R F is independently C1-C6 alkyl, C1-C6 alkoxy, -NO 2 or halogen; z is 0, 1, 2, 3 or 4; f is 1, 2, 3, 4, 5, 6 , 7, 8, 9 or 10; where * connects to AA, ** connects to D;
  • n is 1-24, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 or 24.
  • D is an anticancer drug.
  • D is a tubulin inhibitor, a DNA damaging agent, or a DNA topoisomerase inhibitor.
  • the tubulin inhibitor is selected from dolastatins, auristatins, and maytansines.
  • D is auristatin (auristatin), selected from monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF) , and Auristatin F (auristatin F; AF).
  • auristatin selected from monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF) , and Auristatin F (auristatin F; AF).
  • D is a DNA damaging agent, selected from calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine) diazepines).
  • D is a DNA topoisomerase inhibitor or a salt thereof, selected from irinotecan, irinotecan hydrochloride, camptothecin, 9-aminocamptothecin, 9-nitro Camptothecin, 10-hydroxycamptothecin, 9-chloro-10-hydroxycamptothecin, camptothecin derivatives SN-38, 22-hydroxycamptothecin, topotecan, letotecan, shellfish Lotecan, Exitecan, homosilatecan, 6,8-dibromo-2-methyl-3-[2-(D-xylopyranosylamino)phenyl]-4( 3H)-quinazolinone, 2-cyano-3-(3,4-dihydroxyphenyl)-N-(phenylmethyl)-(2E)-2-acrylamide, 2-cyano-3 -(3,4-Dihydroxyphenyl)-N-(3-hydroxyphenylpropyl)-(
  • the DNA topoisomerase inhibitor is camptothecin, 10-hydroxycamptothecin, topotecan, belotecan, irinotecan, 22-hydroxycamptothecin Or Exitecan, or a salt thereof.
  • D is in
  • X 1 and X 2 are each independently:
  • amino amino substituted by an amino protecting group
  • C1-C6 aminoalkyl optionally substituted by an amino protecting group or C1-C6 alkyl at the amino portion
  • C1-C6 alkyl connected to a heterocycle optionally substituted by one or more C1-C6 alkyl, C1-C6 alkoxy, amino, halogen, nitro or cyano,
  • C1-C6 alkylamino connected to a heterocycle said heterocycle is optionally substituted by C1-C6 alkyl, C1-C6 alkoxy, said amino is optionally substituted by amino protecting group, halogen, nitro, cyano or protecting group substitution,
  • An amino-substituted heterocyclic group which is optionally substituted by a protecting group or one or more C1-C6 alkyl groups at the nitrogen atom of the heterocyclic part or the amino part,
  • Heterocyclic amino which is optionally substituted by a protecting group or a C1-C6 alkyl group at the nitrogen atom of the heterocyclic part or the amino part,
  • a carbamoyl group optionally substituted by a carbamoyl protecting group or a C1-C6 alkyl group,
  • X 3 is C1-C6 alkyl
  • X 4 is H, -(CH 2 ) q -CH 3 , -(CHR n ) q -CH 3 , C3-C8 carbocyclyl, -O-(CH 2 ) q -CH 3 , arylene group -CH 3 , -(CH 2 ) q -arylene-CH 3 , -arylene-(CH 2 ) q -CH 3 , -(CH 2 ) q -(C3-C8 carbocyclyl)-CH 3 , -( C3-C8 carbocyclyl)-(CH 2 ) q -CH 3 , C3-C8 heterocyclyl, -(CH 2 ) q -(C3-C8 heterocyclyl)-CH 3 , -(C3-C8 heterocyclyl base)-(CH 2 ) q -CH 3 , -(CH 2 ) q C(O)NR n (CH 2 )
  • y 0, 1 or 2;
  • Y is O, S or CR 1 R 2 , wherein R 1 and R 2 are each independently H or C1-C6 alkyl;
  • s and t are each independently 0, 1 or 2, but not 0 at the same time.
  • X 4 is H or C1-C6 alkyl.
  • the heterocycle is azetidine, acetalzine, morpholine, pyrrolidine, piperidine, imidazole, thiazole, oxazole or pyridine.
  • the amino protecting group is formyl, acetyl, trityl, tert-butoxycarbonyl, benzyl or p-methoxybenzyloxycarbonyl.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is connected to L.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is connected to L.
  • X 1 and X 2 are each —CH 3 .
  • X and X are each independently F, Cl, Br or I.
  • X and X are each F.
  • X 1 and X 2 are each independently —CH 3 , F, or —OH.
  • X 1 and X 2 are each independently F or —CH 3 .
  • X 1 is —CH 3 and X 2 is F.
  • R is -(CH 2 ) r -.
  • r is 1 or 5.
  • B is Among them, * is connected to M', ** is connected to L, and *** is connected to G.
  • each AA is independently selected from the following amino acid or peptide sequences: Val-Cit, Val-Lys, Phe-Lys, Lys-Lys, Ala-Lys, Phe-Cit, Leu-Cit, Ile- Cit, Trp, Cit, Phe-Ala, Phe-Phe-Lys, D-Phe-Phe-Lys, Gly-Phe-Lys, Leu-Ala-Leu, Ile-Ala-Leu, Val-Ala-Val, Ala- Leu-Ala-Leu, ⁇ -Ala-Leu-Ala-Leu and Gly-Phe-Leu-Gly.
  • i 1
  • AA is Val-Cit and i is 1.
  • each FF is independently Where * connects to AA, ** connects to D, wherein R F is C1-C6 alkyl, C1-C6 alkoxy, -NO 2 or halogen.
  • the halogen is F.
  • each R F is independently -CH3 , F, -NO2 , or -OCH3 .
  • z is 0.
  • z is 1 or 2.
  • f is 1.
  • FF is f is 1; where * connects to AA, ** connects to D.
  • FF is f is 1; where * connects to AA, ** connects to D.
  • L is Where * connects to B, ** connects to D.
  • L is Where * connects to B, ** connects to D.
  • L is Where * connects to B, ** connects to D.
  • n is 4-12.
  • n is 4-8.
  • n 4.
  • n 8.
  • the formula III is:
  • R is selected from: -(CH 2 ) r -, -(CHR m )r-, C3-C8 carbocyclyl, -O-(CH 2 ) r -, arylene, -(CH 2 ) r -arylene Base-, -arylene-(CH 2 )r-, -(CH 2 ) r -(C3-C8 carbocyclyl)-, -(C3-C8 carbocyclyl)-(CH 2 ) r -, C3 -C8 heterocyclyl, -(CH 2 ) r -(C3-C8 heterocyclyl)-, -(C3-C8 heterocyclyl)-(CH 2 ) r -, -(CH 2 ) r C(O) NR m (CH 2 ) r -, -(CH 2 CH 2 O) r -, -(CH 2 CH 2 O) r -CH 2 -
  • D is drugs, such as anticancer drugs, cytotoxic drugs, cell differentiation factors, stem cell nutritional factors, steroid drugs, drugs for the treatment of autoimmune diseases, anti-inflammatory drugs or drugs for the treatment of infectious diseases;
  • n is an integer of 1-24, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23 or 24.
  • D is a tubulin inhibitor, a DNA damaging agent, or a DNA topoisomerase inhibitor.
  • the tubulin inhibitor is selected from dolastatins, auristatins, and maytansines.
  • D is auristatin (auristatin), such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • auristatin such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • D is a DNA damaging agent, such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • a DNA damaging agent such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • D is a DNA topoisomerase inhibitor or a salt thereof, such as irinotecan, irinotecan hydrochloride, camptothecin, 9-aminocamptothecin, 9-nitrocamptothecin Camptothecin, 10-hydroxycamptothecin, 9-chloro-10-hydroxycamptothecin, camptothecin derivatives SN-38, 22-hydroxycamptothecin, topotecan, letotecan, belo Tecan, Exitecan, Homosilatecan, 6,8-Dibromo-2-methyl-3-[2-(D-xylopyranosylamino)phenyl]-4(3H )-quinazolone, 2-cyano-3-(3,4-dihydroxyphenyl)-N-(phenylmethyl)-(2E)-2-acrylamide, 2-cyano-3- (3,4-dihydroxyphenyl)-N-(3-hydroxyphenylpropy
  • the DNA topoisomerase inhibitor is camptothecin, 10-hydroxycamptothecin, topotecan, belotecan, irinotecan, 22-hydroxycamptothecin Or Exitecan, or a salt thereof.
  • D is Tubulysins, taxane drug derivatives, leptomycine derivatives, CC-1065 and its analogs, Amatoxins, splice body inhibitors, benzo (and) diazepines (PBD ) dimers, doxorubicin, methotrexate, vincristine, vinblastine, daunorubicin, mitomycin C, melphalan, or chlorambucil derivatives.
  • PBD diazepines
  • D is
  • X 1 and X 2 are each independently:
  • amino amino substituted by an amino protecting group
  • C1-C6 aminoalkyl optionally substituted by an amino protecting group or C1-C6 alkyl at the amino portion
  • C1-C6 alkyl connected to a heterocycle optionally substituted by one or more C1-C6 alkyl, C1-C6 alkoxy, amino, halogen, nitro or cyano,
  • C1-C6 alkylamino connected to a heterocycle said heterocycle is optionally substituted by C1-C6 alkyl, C1-C6 alkoxy, said amino is optionally substituted by amino protecting group, halogen, nitro, cyano or protecting group substitution,
  • An amino-substituted heterocyclic group which is optionally substituted by a protecting group or one or more C1-C6 alkyl groups at the nitrogen atom of the heterocyclic part or the amino part,
  • Heterocyclic amino which is optionally substituted by a protecting group or a C1-C6 alkyl group at the nitrogen atom of the heterocyclic part or the amino part,
  • a carbamoyl group optionally substituted by a carbamoyl protecting group or a C1-C6 alkyl group,
  • X 3 is C1-C6 alkyl
  • X 4 is H, -(CH 2 ) q -CH 3 , -(CHR n ) q -CH 3 , C3-C8 carbocyclyl, -O-(CH 2 ) q -CH 3 , arylene group -CH 3 , -(CH 2 ) q -arylene-CH 3 , -arylene-(CH 2 ) q -CH 3 , -(CH 2 ) q -(C3-C8 carbocyclyl)-CH 3 , -( C3-C8 carbocyclyl)-(CH 2 ) q -CH 3 , C3-C8 heterocyclyl, -(CH 2 ) q -(C3-C8 heterocyclyl)-CH 3 , -(C3-C8 heterocyclyl base)-(CH 2 ) q -CH 3 , -(CH 2 ) q C(O)NR n (CH 2 )
  • y 0, 1 or 2;
  • Y is O, S or CR 1 R 2 , wherein R 1 and R 2 are each independently H or C1-C6 alkyl;
  • s and t are each independently 0, 1 or 2, but not 0 at the same time.
  • X 4 is H or C1-C6 alkyl.
  • the heterocycle is azetidine, acetalzine, morpholine, pyrrolidine, piperidine, imidazole, thiazole, oxazole or pyridine.
  • the amino protecting group is formyl, acetyl, trityl, tert-butoxycarbonyl, benzyl or p-methoxybenzyloxycarbonyl.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • X 1 and X 2 are each —CH 3 .
  • X and X are each independently F, Cl, Br or I.
  • X and X are each F.
  • X 1 and X 2 are each independently —CH 3 , F, or —OH.
  • X 1 and X 2 are each independently F or —CH 3 .
  • X 1 is —CH 3 and X 2 is F.
  • R is -(CH 2 ) r -.
  • R is -(CH 2 ) r -, and r is 1 or 5.
  • n is 4-12.
  • n is 4-8.
  • n 4.
  • n 8.
  • the formula III is:
  • R is selected from: -(CH 2 ) r -, -(CHR m )r-, C3-C8 carbocyclyl, -O-(CH 2 ) r -, arylene, -(CH 2 ) r -arylene Base-, -arylene-(CH 2 )r-, -(CH 2 ) r -(C3-C8 carbocyclyl)-, -(C3-C8 carbocyclyl)-(CH 2 ) r -, C3 -C8 heterocyclyl, -(CH 2 ) r -(C3-C8 heterocyclyl)-, -(C3-C8 heterocyclyl)-(CH 2 ) r -, -(CH 2 ) r C(O) NR m (CH 2 ) r -, -(CH 2 CH 2 O) r -, -(CH 2 CH 2 O) r -CH 2 -
  • D is drugs, such as anticancer drugs, cytotoxic drugs, cell differentiation factors, stem cell nutritional factors, steroid drugs, drugs for the treatment of autoimmune diseases, anti-inflammatory drugs or drugs for the treatment of infectious diseases;
  • n is an integer of 1-24, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23 or 24.
  • D is a tubulin inhibitor, a DNA damaging agent, or a DNA topoisomerase inhibitor.
  • the tubulin inhibitor is selected from dolastatins, auristatins, and maytansines.
  • D is auristatin (auristatin), such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • auristatin such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • D is a DNA damaging agent, such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • a DNA damaging agent such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • D is a DNA topoisomerase inhibitor or a salt thereof, such as irinotecan, irinotecan hydrochloride, camptothecin, 9-aminocamptothecin, 9-nitrocamptothecin Camptothecin, 10-hydroxycamptothecin, 9-chloro-10-hydroxycamptothecin, camptothecin derivatives SN-38, 22-hydroxycamptothecin, topotecan, letotecan, belo Tecan, Exitecan, Homosilatecan, 6,8-Dibromo-2-methyl-3-[2-(D-xylopyranosylamino)phenyl]-4(3H )-quinazolone, 2-cyano-3-(3,4-dihydroxyphenyl)-N-(phenylmethyl)-(2E)-2-acrylamide, 2-cyano-3- (3,4-dihydroxyphenyl)-N-(3-hydroxyphenylpropy
  • the DNA topoisomerase inhibitor is camptothecin, 10-hydroxycamptothecin, topotecan, belotecan, irinotecan, 22-hydroxycamptothecin Or Exitecan, or a salt thereof.
  • D is Tubulysins, taxane drug derivatives, leptomycine derivatives, CC-1065 and its analogs, Amatoxins, splice body inhibitors, benzo (and) diazepines (PBD ) dimers, doxorubicin, methotrexate, vincristine, vinblastine, daunorubicin, mitomycin C, melphalan or chlorambucil derivatives.
  • PBD diazepines
  • D is
  • X 1 and X 2 are each independently:
  • amino amino substituted by an amino protecting group
  • C1-C6 aminoalkyl optionally substituted by an amino protecting group or C1-C6 alkyl at the amino portion
  • C1-C6 alkyl connected to a heterocycle optionally substituted by one or more C1-C6 alkyl, C1-C6 alkoxy, amino, halogen, nitro or cyano,
  • C1-C6 alkylamino connected to a heterocycle said heterocycle is optionally substituted by C1-C6 alkyl, C1-C6 alkoxy, said amino is optionally substituted by amino protecting group, halogen, nitro, cyano or protecting group substitution,
  • An amino-substituted heterocyclic group which is optionally substituted by a protecting group or one or more C1-C6 alkyl groups at the nitrogen atom of the heterocyclic part or the amino part,
  • Heterocyclic amino which is optionally substituted by a protecting group or a C1-C6 alkyl group at the nitrogen atom of the heterocyclic part or the amino part,
  • a carbamoyl group optionally substituted by a carbamoyl protecting group or a C1-C6 alkyl group,
  • X 3 is C1-C6 alkyl
  • X 4 is H, -(CH 2 ) q -CH 3 , -(CHR n ) q -CH 3 , C3-C8 carbocyclyl, -O-(CH 2 ) q -CH 3 , arylene group -CH 3 , -(CH 2 ) q -arylene-CH 3 , -arylene-(CH 2 ) q -CH 3 , -(CH 2 ) q -(C3-C8 carbocyclyl)-CH 3 , -( C3-C8 carbocyclyl)-(CH 2 ) q -CH 3 , C3-C8 heterocyclyl, -(CH 2 ) q -(C3-C8 heterocyclyl)-CH 3 , -(C3-C8 heterocyclyl base)-(CH 2 ) q -CH 3 , -(CH 2 ) q C(O)NR n (CH 2 )
  • y 0, 1 or 2;
  • Y is O, S or CR 1 R 2 , wherein R 1 and R 2 are each independently H or C1-C6 alkyl;
  • s and t are each independently 0, 1 or 2, but not 0 at the same time.
  • X 4 is H or C1-C6 alkyl.
  • the heterocycle is azetidine, acetalzine, morpholine, pyrrolidine, piperidine, imidazole, thiazole, oxazole or pyridine.
  • the amino protecting group is formyl, acetyl, trityl, tert-butoxycarbonyl, benzyl or p-methoxybenzyloxycarbonyl.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • X 1 and X 2 are each —CH 3 .
  • X and X are each independently F, Cl, Br or I.
  • X and X are each F.
  • X 1 and X 2 are each independently —CH 3 , F, or —OH.
  • X 1 and X 2 are each independently F or —CH 3 .
  • X 1 is —CH 3 and X 2 is F.
  • R is -(CH 2 ) r -.
  • R is -(CH 2 ) r -, and r is 1 or 5.
  • n is 4-12.
  • n is 4-8.
  • n 4.
  • n 8.
  • the formula III is:
  • D is drugs, such as anticancer drugs, cytotoxic drugs, cell differentiation factors, stem cell nutritional factors, steroid drugs, drugs for the treatment of autoimmune diseases, anti-inflammatory drugs or drugs for the treatment of infectious diseases;
  • n is an integer of 1-24, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23 or 24.
  • D is a tubulin inhibitor, a DNA damaging agent, or a DNA topoisomerase inhibitor.
  • the tubulin inhibitor is selected from dolastatins, auristatins, and maytansines.
  • D is auristatin (auristatin), such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • auristatin such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • D is a DNA damaging agent, such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • a DNA damaging agent such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • D is a DNA topoisomerase inhibitor or a salt thereof, such as irinotecan, irinotecan hydrochloride, camptothecin, 9-aminocamptothecin, 9-nitrocamptothecin Camptothecin, 10-hydroxycamptothecin, 9-chloro-10-hydroxycamptothecin, camptothecin derivatives SN-38, 22-hydroxycamptothecin, topotecan, letotecan, belo Tecan, Exitecan, Homosilatecan, 6,8-Dibromo-2-methyl-3-[2-(D-xylopyranosylamino)phenyl]-4(3H )-quinazolone, 2-cyano-3-(3,4-dihydroxyphenyl)-N-(phenylmethyl)-(2E)-2-acrylamide, 2-cyano-3- (3,4-dihydroxyphenyl)-N-(3-hydroxyphenylpropy
  • the DNA topoisomerase inhibitor is camptothecin, 10-hydroxycamptothecin, topotecan, belotecan, irinotecan, 22-hydroxycamptothecin Or Exitecan, or a salt thereof.
  • D is Tubulysins, taxane drug derivatives, leptomycine derivatives, CC-1065 and its analogs, Amatoxins, splice body inhibitors, benzo (and) diazepines (PBD ) dimers, doxorubicin, methotrexate, vincristine, vinblastine, daunorubicin, mitomycin C, melphalan, or chlorambucil derivatives.
  • PBD diazepines
  • D is
  • X 1 and X 2 are each independently:
  • amino amino substituted by an amino protecting group
  • C1-C6 aminoalkyl optionally substituted by an amino protecting group or C1-C6 alkyl at the amino portion
  • C1-C6 alkyl connected to a heterocycle optionally substituted by one or more C1-C6 alkyl, C1-C6 alkoxy, amino, halogen, nitro or cyano,
  • C1-C6 alkylamino connected to a heterocycle said heterocycle is optionally substituted by C1-C6 alkyl, C1-C6 alkoxy, said amino is optionally substituted by amino protecting group, halogen, nitro, cyano or protecting group substitution,
  • An amino-substituted heterocyclic group which is optionally substituted by a protecting group or one or more C1-C6 alkyl groups at the nitrogen atom of the heterocyclic part or the amino part,
  • Heterocyclic amino which is optionally substituted by a protecting group or a C1-C6 alkyl group at the nitrogen atom of the heterocyclic part or the amino part,
  • a carbamoyl group optionally substituted by a carbamoyl protecting group or a C1-C6 alkyl group,
  • X 3 is C1-C6 alkyl
  • X 4 is H, -(CH 2 ) q -CH 3 , -(CHR n ) q -CH 3 , C3-C8 carbocyclyl, -O-(CH 2 ) q -CH 3 , arylene group -CH 3 , -(CH 2 ) q -arylene-CH 3 , -arylene-(CH 2 ) q -CH 3 , -(CH 2 ) q -(C3-C8 carbocyclyl)-CH 3 , -( C3-C8 carbocyclyl)-(CH 2 ) q -CH 3 , C3-C8 heterocyclyl, -(CH 2 ) q -(C3-C8 heterocyclyl)-CH 3 , -(C3-C8 heterocyclyl base)-(CH 2 ) q -CH 3 , -(CH 2 ) q C(O)NR n (CH 2 )
  • y 0, 1 or 2;
  • Y is O, S or CR 1 R 2 , wherein R 1 and R 2 are each independently H or C1-C6 alkyl;
  • s and t are each independently 0, 1 or 2, but not 0 at the same time.
  • X 4 is H or C1-C6 alkyl.
  • the heterocycle is azetidine, acetalzine, morpholine, pyrrolidine, piperidine, imidazole, thiazole, oxazole or pyridine.
  • the amino protecting group is formyl, acetyl, trityl, tert-butoxycarbonyl, benzyl or p-methoxybenzyloxycarbonyl.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • X 1 and X 2 are each —CH 3 .
  • X and X are each independently F, Cl, Br or I.
  • X and X are each F.
  • X 1 and X 2 are each independently —CH 3 , F, or —OH.
  • X 1 and X 2 are each independently F or —CH 3 .
  • X 1 is —CH 3 and X 2 is F.
  • n is 4-12.
  • n is 4-8.
  • n 4.
  • n 8.
  • the formula III is:
  • D is drugs, such as anticancer drugs, cytotoxic drugs, cell differentiation factors, stem cell nutritional factors, steroid drugs, drugs for the treatment of autoimmune diseases, anti-inflammatory drugs or drugs for the treatment of infectious diseases;
  • n is an integer of 1-24, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23 or 24.
  • D is a tubulin inhibitor DNA damaging agent or a DNA topoisomerase inhibitor.
  • the tubulin inhibitor is selected from dolastatins, auristatins, and maytansines.
  • D is auristatin (auristatin), such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • auristatin such as monomethyl auristatin E (monomethyl auristatin E; MMAE), monomethyl auristatin F (monomethyl auristatin F; MMAF), and Auristatin F (auristatin F; AF).
  • D is a DNA damaging agent, such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • a DNA damaging agent such as calicheamicins, duocarmycins, antramycin derivatives PBD (pyrrolobenzodiazepine, pyrrolobenzodiazepine, aza).
  • D is a DNA topoisomerase inhibitor or a salt thereof, such as irinotecan, irinotecan hydrochloride, camptothecin, 9-aminocamptothecin, 9-nitrocamptothecin Camptothecin, 10-hydroxycamptothecin, 9-chloro-10-hydroxycamptothecin, camptothecin derivatives SN-38, 22-hydroxycamptothecin, topotecan, letotecan, belo Tecan, Exitecan, Homosilatecan, 6,8-Dibromo-2-methyl-3-[2-(D-xylopyranosylamino)phenyl]-4(3H )-quinazolone, 2-cyano-3-(3,4-dihydroxyphenyl)-N-(phenylmethyl)-(2E)-2-acrylamide, 2-cyano-3- (3,4-dihydroxyphenyl)-N-(3-hydroxyphenylpropy
  • the DNA topoisomerase inhibitor is camptothecin, 10-hydroxycamptothecin, topotecan, belotecan, irinotecan, 22-hydroxycamptothecin Or Exitecan, or a salt thereof.
  • D is Tubulysins, taxane drug derivatives, leptomycine derivatives, CC-1065 and its analogs, Amatoxins, splice body inhibitors, benzo (and) diazepines (PBD ) dimers, doxorubicin, methotrexate, vincristine, vinblastine, daunorubicin, mitomycin C, melphalan, or chlorambucil derivatives.
  • PBD diazepines
  • D is in
  • X 1 and X 2 are each independently:
  • amino amino substituted by an amino protecting group
  • C1-C6 aminoalkyl optionally substituted by an amino protecting group or C1-C6 alkyl at the amino portion
  • C1-C6 alkyl connected to a heterocycle optionally substituted by one or more C1-C6 alkyl, C1-C6 alkoxy, amino, halogen, nitro or cyano,
  • C1-C6 alkylamino connected to a heterocycle said heterocycle is optionally substituted by C1-C6 alkyl, C1-C6 alkoxy, said amino is optionally substituted by amino protecting group, halogen, nitro, cyano or protecting group substitution,
  • An amino-substituted heterocyclic group which is optionally substituted by a protecting group or one or more C1-C6 alkyl groups at the nitrogen atom of the heterocyclic part or the amino part,
  • Heterocyclic amino which is optionally substituted by a protecting group or a C1-C6 alkyl group at the nitrogen atom of the heterocyclic part or the amino part,
  • a carbamoyl group optionally substituted by a carbamoyl protecting group or a C1-C6 alkyl group,
  • X 3 is C1-C6 alkyl
  • X 4 is H, -(CH 2 ) q -CH 3 , -(CHR n ) q -CH 3 , C3-C8 carbocyclyl, -O-(CH 2 ) q -CH 3 , arylene group -CH 3 , -(CH 2 ) q -arylene-CH 3 , -arylene-(CH 2 ) q -CH 3 , -(CH 2 ) q -(C3-C8 carbocyclyl)-CH 3 , -( C3-C8 carbocyclyl)-(CH 2 ) q -CH 3 , C3-C8 heterocyclyl, -(CH 2 ) q -(C3-C8 heterocyclyl)-CH 3 , -(C3-C8 heterocyclyl base)-(CH 2 ) q -CH 3 , -(CH 2 ) q C(O)NR n (CH 2 )
  • y 0, 1 or 2;
  • Y is O, S or CR 1 R 2 , wherein R 1 and R 2 are each independently H or C1-C6 alkyl;
  • s and t are each independently 0, 1 or 2, but not 0 at the same time.
  • X 4 is H or C1-C6 alkyl.
  • the heterocycle is azetidine, acetalzine, morpholine, pyrrolidine, piperidine, imidazole, thiazole, oxazole or pyridine.
  • the amino protecting group is formyl, acetyl, trityl, tert-butoxycarbonyl, benzyl or p-methoxybenzyloxycarbonyl.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • D is Wherein X 1 and X 2 are each independently C1-C6 alkyl, halogen or -OH; ** is the point of attachment.
  • X 1 and X 2 are each —CH 3 .
  • X and X are each independently F, Cl, Br or I.
  • X and X are each F.
  • X 1 and X 2 are each independently —CH 3 , F, or —OH.
  • X 1 and X 2 are each independently F or —CH 3 .
  • X 1 is —CH 3 and X 2 is F.
  • n is 4-12.
  • n is 4-8.
  • n 4.
  • n 8.
  • formula III is selected from the following structures:
  • One or more embodiments provide the compound (1S,9S)-1-amino-9-ethyl-4,5-difluoro-9-hydroxyl-1,2,3,9,12,15-hexahydro- 10H,13H benzo[de]pyrano[3',4':6,7]indolo[1,2-b]quinoline-10,13, or a pharmaceutically acceptable salt or solvate thereof thing.
  • One or more embodiments provide a pharmaceutical composition, which comprises a drug conjugate, such as an antibody drug conjugate, or a pharmaceutically acceptable salt or solvate thereof, and a pharmaceutically acceptable carrier, excipient and/or or excipients, and optionally other anticancer drugs.
  • a drug conjugate such as an antibody drug conjugate, or a pharmaceutically acceptable salt or solvate thereof
  • a pharmaceutically acceptable carrier such as by infusion or bolus injection, absorbed through the epithelium or mucous membranes (eg, oral mucosa, rectal and intestinal mucosa, etc.), and may be co-administered with other biologically active agents.
  • the pharmaceutical composition may be administered intravenously, subcutaneously, orally, rectally, parenterally, intracisternally, intravaginally, intraperitoneally, externally (e.g. by powder, ointment, drops, or transdermal patch), orally, or by oral or nasal spray.
  • the term "pharmaceutically acceptable carrier” generally refers to any type of non-toxic solid, semi-solid or liquid filler, diluent, encapsulating material or formulation auxiliary, etc.
  • carrier refers to a diluent, adjuvant, excipient or carrier with which the active ingredient can be administered to a patient.
  • Such pharmaceutical carriers can be sterile liquids, such as water and oils, including those of petroleum, animal, vegetable or synthetic origin, such as peanut oil, soybean oil, mineral oil, sesame oil and the like. Water is a preferred carrier when the pharmaceutical composition is administered intravenously. Saline solutions and aqueous dextrose and glycerol solutions can also be employed as liquid carriers, particularly for injectable solutions.
  • Suitable pharmaceutical excipients include starch, glucose, lactose, sucrose, gelatin, malt, rice, flour, chalk, silica gel, sodium stearate, glyceryl monostearate, talc, sodium chloride, skim milk powder, glycerol, Propylene, ethylene glycol, water, ethanol, etc.
  • the composition if desired, can also contain minor amounts of wetting or emulsifying agents, or pH buffering agents such as acetates, citrates or phosphates.
  • Antibacterial agents such as benzyl alcohol or methylparaben, antioxidants such as ascorbic acid or sodium bisulfite, chelating agents such as ethylenediaminetetraacetic acid, and tonicity adjusting agents such as sodium chloride or dextrose are also contemplated.
  • These compositions may take the form of solutions, suspensions, emulsions, tablets, pills, capsules, powders, sustained release formulations and the like.
  • the composition can be formulated as a suppository, with traditional binders and carriers such as triglycerides.
  • Oral formulations can include standard carriers such as pharmaceutical grades of mannitol, lactose, starch, magnesium stearate, sodium saccharine, cellulose, magnesium carbonate, and the like.
  • compositions will contain a clinically effective dose of the antibody or antigen-binding fragment, preferably in purified form, together with an appropriate amount of carrier to provide a form suitable for administration to the patient.
  • the formulation should be suitable for the mode of administration.
  • the parent formulation can be enclosed in ampoules, disposable syringes or multiple dose vials made of glass or plastic.
  • the composition is formulated into a pharmaceutical composition suitable for intravenous injection to human body according to conventional procedures.
  • Compositions for intravenous administration are generally solutions in sterile isotonic aqueous buffer.
  • the composition may also contain a solubilizer and a local anesthetic such as lidocaine to relieve pain at the injection site.
  • the active ingredients are presented alone or in combination in unit dosage form, eg, as a dry lyophilized powder or water-free concentrate, in a hermetically sealed container such as an ampoule or sachet indicating the quantity of active agent.
  • the composition may be dispensed with an infusion bottle containing sterile pharmaceutical grade water or saline.
  • an ampoule of sterile water or saline for injection can be used so that the active ingredient can be mixed before administration.
  • One or more embodiments provide the use of drug conjugates in the preparation of drugs for treating cancer, autoimmune diseases, inflammatory diseases or infectious diseases.
  • the drug conjugate is used in combination with other anticancer drugs.
  • One or more embodiments provide linkers or intermediates or pharmaceutically acceptable salts or solvates thereof in the preparation of drug conjugates, such as antibody drug conjugates, or pharmaceutically acceptable salts or solvates thereof use in things.
  • salts include drug conjugates, such as antibody drug conjugates, with a wide variety of organic and inorganic counterions well known in the art, only exemplary salts include, When the molecule contains acidic functional groups, organic or inorganic salts such as sodium salt, potassium salt, calcium salt, magnesium salt, ammonium salt, isopropylamine, trimethylamine, diethylamine, triethylamine, tripropylamine, ethanolamine, 2-di Methylaminoethanol, 2-Diethylaminoethanol, Dicyclohexylamine, Lysine, Arginine, Histidine, Caffeine, Procaine, Choline, Betaine, Ethylenediamine, Glucose Amines, meglucamine, theobromine, purine piperazine, piperidine, N-ethyl, piperidine, polyamine resins and tetraalkylammonium salts, etc.; and when the molecule contains basic functional groups, organic or inorganic acid salts, organic
  • acids include sulfuric acid, nitric acid, phosphoric acid, propionic acid, glycolic acid, pyruvic acid, malonic acid, succinic acid, fumaric acid, tartaric acid, citric acid, benzoic cinnamic acid, mandelic acid, methanesulfonic acid, Ethylsulfonic acid, p-toluenesulfonic acid salicylic acid, etc.
  • Solvates include hydrates. These salts can generally be prepared by conventional methods by reacting, for example, an appropriate acid or base with the ADC of the invention.
  • One or more embodiments provide a method of treating cancer comprising administering to a patient an effective amount of an antibody drug conjugate.
  • the effective amount refers to the amount of an active compound or agent that results in the biological or pharmaceutical response of a tissue, system, animal, individual, and human being sought by the researcher, veterinarian, physician, or other clinician, including the treatment of a disease .
  • a suitable dosage range may be about 0.1-100 mg/kg, and the frequency of administration may be, for example, once a month, once every two weeks, once every three weeks, twice every three weeks, Dosing is done three times every four weeks, once a week, twice a week, etc.
  • the administration method can be intravenous infusion, intravenous injection, subcutaneous injection, intramuscular injection, etc.
  • One or more embodiments provide drug conjugates, such as antibody drug conjugates, for use as medicaments.
  • One or more embodiments provide drug conjugates, such as antibody drug conjugates, or pharmaceutical compositions comprising drug conjugates, such as antibody drug conjugates, in the preparation of drugs for treating and/or preventing diseases application.
  • One or more embodiments provide drug conjugates, such as antibody drug conjugates, for the treatment of cancer, autoimmune disease, inflammatory disease or infectious disease; said cancer includes triple negative breast cancer, colloid Blastoma, medulloblastoma, urothelial carcinoma, breast cancer, head and neck cancer, kidney cancer (clear cell renal cell carcinoma and papillary renal cell carcinoma), ovarian cancer (eg, ovarian adenocarcinoma and ovarian teratoma) , pancreatic cancer, gastric cancer, Kaposi's sarcoma, lung cancer (such as small cell lung cancer and non-small cell lung cancer), cervical cancer, colorectal cancer, esophageal cancer, oral squamous cell carcinoma, prostate cancer, thyroid cancer, bladder cancer, nerve Glioma, hepatobiliary cancer, colorectal cancer, T-cell lymphoma, uterine cancer, liver cancer, endometrial cancer, salivary gland cancer, esophageal cancer, melanom
  • One or more embodiments provide an article of manufacture comprising a drug conjugate or a pharmaceutical composition
  • Figure 1 shows the results of flow cytometry detection of CHO-CLDN18.2 cells, in the figure from left to right are CHO cells and CHO-CLDN18.2 cells;
  • Figure 2 shows the dose curves of ADC8, ADC10, ADC11 and ADC12 on CHO-CLDN18.2 cell proliferation inhibition.
  • FIG. 3 shows the ADC1 bystander effect.
  • FIG. 4 shows the ADC4 bystander effect.
  • FIG. 5 shows the bystander effect for ADC9, ADC11 and ADC12.
  • Figure 6 shows the bystander effect of ADC14.
  • FIG. 7 shows the bystander effect of ADC16.
  • Fig. 8 shows the blood drug concentration changes in ADC4 rats.
  • Figure 9 shows the effect of ADC4 in inhibiting tumor growth.
  • Figure 10 shows the effect of ADC1 and ADC2 in inhibiting tumor growth.
  • Figure 11 shows the effect of ADC4 and ADC6 in inhibiting tumor growth.
  • Figure 12 shows the effect of ADC9, ADC11 and ADC12 in inhibiting tumor growth.
  • Figure 13 shows the tumor weights of mice in each group of ADC9, ADC11, ADC12 and ADC13 in the GA0006 xenograft model (mean ⁇ standard error).
  • Figure 14 shows the in vivo tumor suppressor activity of ADC14.
  • Figure 15 shows the in vivo tumor suppressive effect of ADC16.
  • Figure 16 shows the tumor suppressive effect of ADC16 in vivo.
  • Alkyl means a saturated aliphatic hydrocarbyl group, and the term includes straight and branched chain hydrocarbyl groups.
  • C1-C20 alkyl such as C1-C6 alkyl.
  • C1-C20 alkyl refers to an alkyl group having 1 to 20 carbon atoms, for example having 1 carbon atom, 2 carbon atoms, 3 carbon atoms, 4 carbon atoms, 5 carbon atoms, 6 carbon atoms, 7 carbon atoms, 8 carbon atoms, 9 carbon atoms, 10 carbon atoms, 11 carbon atoms, 12 carbon atoms, 13 carbon atoms, 14 carbon atoms, 15 carbon atoms, 16 carbon atoms, 17 carbon atoms carbon atoms, 18 carbon atoms, 19 carbon atoms or 20 carbon atoms.
  • alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-pentyl, neopentyl, n-hexyl, and the like.
  • the alkyl group may be unsubstituted or substituted with one or more substituents including, but not limited to, alkyl, alkoxy, cyano, hydroxyl, carbonyl, carboxy, aryl, heteroaryl, Amino, halogen, sulfonyl, sulfinyl, phosphono, etc.
  • Carbocyclyl means a stable non-aromatic monocyclic or polycyclic hydrocarbon radical consisting only of carbon and hydrogen atoms, which may include fused or bridged ring systems, having from 3 to 15 carbon atoms, e.g. Has 3 to 10 (eg 3, 4, 5, 6, 7, 8, 9 or 10) carbon atoms and is saturated or unsaturated and attached to the remainder of the molecule by a single bond.
  • Monocyclic radicals include, for example, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl and cyclooctyl.
  • Polycyclic radicals include, for example, adamantyl, norbornyl, decalinyl, and the like.
  • the carbocyclic group may be optionally substituted by one or more substituents independently selected from the following: alkyl, halogen, haloalkyl, cyano, nitro, oxo, aryl , aralkyl, carbocyclyl, carbocyclylalkyl, heterocyclyl, heterocyclylalkyl, heteroaryl, heteroarylalkyl.
  • Aryl refers to an all-carbon monocyclic or all-carbon fused ring with a fully conjugated pi-electron system, typically having 5-14 carbon atoms, eg, 6, 10, 12, 14 carbon atoms.
  • Aryl groups may be unsubstituted or substituted with one or more substituents including, but not limited to, alkyl, alkoxy, cyano, hydroxyl, carboxy, aryl, aralkyl, amine, Halogen, sulfonyl, sulfinyl, phosphono.
  • unsubstituted aryl groups include, but are not limited to, phenyl, naphthyl, and anthracenyl.
  • Heterocyclyl means a stable 3- to 18-membered aromatic or non-aromatic ring substituent consisting of 2 to 8 (eg 2, 3, 4, 5, 6, 7 or 8) carbon atoms and It consists of 1 to 6 (1, 2, 3, 4, 5 or 6) heteroatoms selected from nitrogen, oxygen and sulfur.
  • the heterocyclyl can be a monocyclic, bicyclic, tricyclic or tetracyclic ring system, which can include fused or bridged ring systems; and the nitrogen, carbon or sulfur atoms in the heterocyclyl can be any is optionally oxidized; the nitrogen atom is optionally quaternized; and the heterocyclyl group may be partially or fully saturated.
  • heterocyclic groups include, but are not limited to, dioxolanyl, dioxinyl, thienyl[1,3]dithianyl, decahydroisoquinolyl, imidazolinyl, imidazolidinyl, iso Thiazolidinyl, isoxazolidinyl, morpholinyl, octahydroindolyl, octahydroisoindolyl, 2-oxopiperazinyl, 2-oxopiperidinyl, 2-oxopyrrolidinyl , oxazolidinyl, piperidinyl, piperazinyl, 4-piperidinonyl, piperrolidinyl, pyrazolidinyl, quinuclidinyl, thiazolidinyl, 1,2,4-thiadiazole -5(4H)-yl, tetrahydrofuranyl, trioxanyl, trithianyl, triazin
  • the heterocyclic group may be optionally substituted by one or more substituents selected from the group consisting of alkyl, alkenyl, halogen, haloalkyl, cyano, oxo, thioxo , nitro, aryl, aralkyl, cycloalkyl, cycloalkylalkyl, optionally substituted heterocyclyl, optionally substituted heterocyclylalkyl, optionally substituted heteroaryl, optionally substituted hetero Arylalkyl.
  • Alkoxy means the formula -O-(alkyl), wherein alkyl is as defined herein.
  • alkoxy groups are methoxy, ethoxy, n-propoxy, 1-methylethoxy (isopropoxy), n-butoxy, isobutoxy, sec-butoxy , tert-butoxyl. Alkoxy groups can be substituted or unsubstituted.
  • Halogen means fluorine (F), chlorine (Cl), bromine (Br), or iodine (I).
  • Amino refers to -NH2 .
  • Niro refers to -NO2 .
  • Carboxy means -COOH.
  • Polypeptide refers to a molecule composed of two or more amino acid monomers linearly linked by amide bonds (also known as peptide bonds), and may include dipeptides, tripeptides, tetrapeptides, oligopeptides, and the like.
  • Amino acid refers to an organic compound containing both amino and carboxyl groups, such as ⁇ -amino acid and ⁇ -amino acid.
  • Amino acids include alanine (three-letter code: Ala, one-letter code: A), arginine (Arg, R), asparagine (Asn, N), aspartic acid (Asp, D), cysteine Acid (Cys, C), Glutamine (Gln, Q), Glutamic Acid (Glu, E), Glycine (Gly, G), Histidine (His, H), Isoleucine (Ile, I) , Leucine (Leu, L), Lysine (Lys, K), Methionine (Met, M), Phenylalanine (Phe, F), Proline (Pro, P), Serine ( Ser, S), Threonine (Thr, T), Tryptophan (Trp, W), Tyrosine (Tyr, Y), Valine (Val, V), Sarcosine (
  • amino acid or polypeptide when an amino acid or polypeptide is a constituent part of a molecule (such as an antibody or ADC), the amino acid or polypeptide refers to the amino acid residue or polypeptide residue (whether written or not), that is, its interaction with other parts of the molecule
  • some of its groups such as a hydrogen atom of its amino group and/or a hydroxyl group of a carboxyl group
  • covalent bonds such as amide bonds
  • amino acid sequence of an antibody or immunoglobulin molecule are encompassed by the present disclosure, provided that the amino acid sequence identity remains at least 75%, such as at least 80%, 90%, 95%, and such as 99%.
  • the changes are conservative amino acid substitutions.
  • Conservative amino acid substitutions are substitutions that occur within a family of amino acids that are related in their side chains.
  • Amino acids encoded by genes are roughly divided into the following categories: (1) acidic amino acids are aspartate and glutamate; (2) basic amino acids are lysine, arginine, histidine; (3) non-polar amino acids (4) uncharged polar amino acids are Glycine, Asparagine, Glutamine, Cysteine, Serine, Threonine, Tyrosine.
  • amino acids include (i) the aliphatic-hydroxyl family of serine and threonine; (ii) the amide-containing family of asparagine and glutamine; (iii) the aliphatic family of alanine, valine, leucine and isoleucine; and (iv) phenylalanine, tryptophan and tyrosine of the aromatic family.
  • the conservative amino acid substitution group is: valine-leucine-isoleucine, phenylalanine-tyrosine, lysine-arginine, alanine-valine acid, glutamate-aspartate, and asparagine-glutamine.
  • amino acid substitutions have the effect of (1) reducing susceptibility to proteolysis, (2) reducing susceptibility to oxidation, (3) altering the binding Affinity, (4) altering binding affinity, and (5) conferring or improving other physicochemical or functional properties of such analogs.
  • Analogs may include various muteins that differ in sequence from the naturally occurring peptide sequence. For example, single or multiple amino acid substitutions (preferably conservative amino acid substitutions) may be made in naturally occurring sequences (preferably in portions of the polypeptide other than domains that form intermolecular contacts).
  • Conservative amino acid substitutions should not significantly alter the structural properties of the parent sequence (eg, the substituted amino acid should not tend to disrupt the helical structure present in the parent sequence, or disrupt other types of secondary structure that characterize the parent sequence).
  • Examples of secondary and tertiary structures of artificially recognized polypeptides are described in Proteins, Structures and Molecular Principles (Creighton ed., W.H. Freeman and Company, New York (1984)); Introduction to Protein Structure (C. Branden and J. Tooze eds. , Garland Publishing, New York, N.Y. (1991)); and Thornton et al. Nature 354:105 (1991).
  • the number of conservative amino acid substitutions of VL and VH is about 1, about 2, about 3, about 4, about 5, about 6, about 8, about 9, about 10, about 11 , about 13, about 14, about 15 conservative amino acid substitutions, or a range between any two of these values (inclusive), or any value therein.
  • the number of amino acids of the heavy chain constant region, the light chain constant region, the conservative amino acid substitutions of the heavy chain or the light chain is about 1, about 2, about 3, about 4, about 5, about 6, about 8 amino acids , about 9, about 10, about 11, about 13, about 14, about 15, about 18, about 19, about 22, about 24, about 25, about 29, about 31, about 35, about 38, about 41, about 45 conservative amino acid substitutions, or a range between any two of these values (inclusive) or any value therein.
  • polypeptides or polynucleotides refers to polypeptides or polynucleotides, meaning forms of polypeptides or polynucleotides that do not occur in nature, non-limiting examples may be produced by combination of polynucleotides or polynucleotides that do not normally exist or peptide.
  • Homology refers to sequence similarity between two peptides or between two nucleic acid molecules. Homology or identity can be determined by comparing the alignable positions in each sequence. When a position in the sequences being compared is occupied by the same base or amino acid, then the molecules are homologous or identical at that position. The degree of homology between sequences is a function of the number of matching or homologous positions shared by the sequences.
  • At least 80% identity is about 80% identity, about 81% identity, about 82% identity, about 83% identity, about 85% identity, about 86% identity, about 87% identity, About 88% identity, about 90% identity, about 91% identity, about 92% identity, about 94% identity, about 95% identity, about 98% identity, about 99% identity, or these A range (inclusive) between any two values in a value, or any value therein.
  • At least 90% identity is about 90% identity, about 91% identity, about 92% identity, about 93% identity, about 95% identity, about 96% identity, about 97% identity, About 98% identity, about 99% identity, or a range between any two of these values, inclusive, or any value therein.
  • Antibody and antigen-binding fragment refer to a polypeptide or polypeptide complex that specifically recognizes and binds to an antigen.
  • Antibodies can be whole antibodies and any antigen-binding fragments thereof or single chains thereof.
  • the term “antibody” thus includes any protein or peptide whose molecule contains at least a portion of an immunoglobulin molecule that has the biological activity to bind an antigen.
  • Antibodies and antigen-binding fragments include, but are not limited to, complementarity determining regions (CDRs), heavy chain variable regions (VH), light chain variable regions (VL), heavy chain constant regions of heavy or light chains or ligand-binding portions thereof (CH), light chain constant region (CL), framework region (FR) or any portion thereof, or at least a portion of a binding protein.
  • the CDR regions include the CDR regions of the light chain variable region (VL CDR1-3) and the CDR regions of the heavy chain variable region (VH CDR1-3).
  • An antibody or antigen-binding unit thereof can specifically recognize and bind a polypeptide or polypeptide complex of one or more (eg, two) antigens.
  • An antibody or antigen-binding unit thereof that specifically recognizes and binds multiple (eg, two) antigens may be referred to as a multispecific (eg, bispecific) antibody or antigen-binding unit thereof.
  • antibody fragment refers to a part of an antibody, and the composition of the antibody fragment of the present invention can be similar to F(ab')2, F(ab)2, Fab', Fab in monospecific antibody fragments , Fv, scFv, etc. Regardless of their structure, antibody fragments bind to the same antigen recognized by the intact antibody.
  • antibody fragment includes aptamers, Spiegelmers and diabodies.
  • antiigen-binding fragment also includes any synthetic or genetically engineered protein that functions as an antibody by binding to a specific antigen to form a complex.
  • antibody includes a wide variety of polypeptides that can be distinguished biochemically.
  • classes of heavy chains include gamma, mu, alpha, delta or epsilon ( ⁇ , ⁇ , ⁇ , ⁇ , ⁇ ), with some subclasses (eg ⁇ 1- ⁇ 4).
  • the nature of this chain determines the "class” of the antibody as IgG, IgM, IgA, IgG or IgE, respectively.
  • the immunoglobulin subclasses (isotypes), eg, IgGl, IgG2, IgG3, IgG4, IgG5, etc., are well characterized and the functional specificities conferred are also known.
  • the immunoglobulin molecule is of the IgG class.
  • the two heavy chains and the two light chains are linked by disulfide bonds in a "Y" configuration, where the light chains begin at the mouth of the "Y” and continue through the variable region surrounding the heavy chains.
  • Antibodies, antigen-binding fragments or derivatives disclosed in the present invention include but are not limited to polyclonal, monoclonal, multispecific, fully human, humanized, primatized, chimeric antibodies, single chain antibodies, epitope binding Fragments (eg Fab-like, Fab'-like and F(ab')-like 2), single-chain Fvs-like (scFv).
  • Light chains can be classified as kappa ( ⁇ ) or lambda ( ⁇ ). Each heavy chain can be associated with a kappa or lambda light chain.
  • ⁇ kappa
  • lambda ⁇
  • Each heavy chain can be associated with a kappa or lambda light chain.
  • immunoglobulins are produced by hybridomas, B cells, or genetically engineered host cells, their light and heavy chains are joined by a covalent bond, and the "tail" portions of the two heavy chains are linked by a covalent disulfide bond or non-covalent bonding.
  • the amino acid sequence extends from the N-terminus at the forked end of the Y configuration to the C-terminus at the bottom of each chain.
  • the variable region of the immunoglobulin kappa light chain is V ⁇ ; the variable region of the immunoglobulin lambda light chain is V ⁇ .
  • variable regions of the light chain (VL) and the variable region of the heavy chain (VH) determine antigen recognition and specificity.
  • the light chain constant region (CL) and the heavy chain constant region (CH) confer important biological properties such as secretion, transplacental movement, Fc receptor binding, complement fixation, etc. By convention, the numbering of constant regions increases as they become farther away from the antigen-binding site or amino terminus of the antibody.
  • the N-terminal portion is the variable region and the C-terminal portion is the constant region; the CH3 and CL domains actually comprise the carboxy-terminal ends of the heavy and light chains, respectively.
  • Antibodies disclosed in the present invention may be derived from any animal, including but not limited to fish, birds and mammals.
  • the antibody is of human, murine, donkey, rabbit, goat, camel, llama, horse or chicken origin.
  • the variable regions may be of condricthoid origin (eg, from sharks).
  • a "heavy chain constant region” includes at least one of a CH1 domain, a hinge (eg, upper, middle, and/or lower hinge region) domain, a CH2 domain, a CH3 domain, or a variant or fragment.
  • the heavy chain constant regions of antibodies can be derived from different immunoglobulin molecules.
  • the heavy chain constant region of a polypeptide can include a CH1 domain derived from an IgG1 molecule and a hinge region derived from an IgG3 molecule.
  • the heavy chain constant region may comprise a hinge region derived partly from an IgG1 molecule and partly from an IgG3 molecule.
  • part of the heavy chain may comprise a chimeric hinge region derived partly from an IgGl molecule and partly from an IgG4 molecule.
  • a “light chain constant region” includes a portion of the amino acid sequence from an antibody light chain.
  • the light chain constant region comprises at least one of a constant kappa domain or a constant lambda domain.
  • a “light chain-heavy chain pair” refers to a collection of light and heavy chains that can form dimers through disulfide bonds between the CL domain of the light chain and the CH1 domain of the heavy chain.
  • antibody drug conjugate refers to a binding polypeptide (such as an antibody or antigen-binding unit thereof) linked to one or more chemical drugs, which may optionally be therapeutic or cytotoxic agents.
  • the ADC comprises an antibody, a drug (eg, a cytotoxic drug) and a linker enabling attachment or conjugation of the drug to the antibody.
  • Non-limiting examples of drugs that may be included in the ADC are mitotic inhibitors, antitumor antibiotics, immunomodulators, vectors for gene therapy, alkylating agents, antiangiogenic agents, antimetabolites, boron-containing agents, chemical Protective agents, hormones, antihormonal agents, corticosteroids, photoactive therapeutic agents, oligonucleotides, radionuclide agents, topoisomerase inhibitors, kinase inhibitors (eg, TEC-family kinase inhibitors and serine/threonine amino acid kinase inhibitors) and radiosensitizers.
  • mitotic inhibitors eg, TEC-family kinase inhibitors and serine/threonine amino acid kinase inhibitors
  • DAR drug antibody conjugation ratio
  • the term “drug antibody conjugation ratio” or “DAR” refers to the amount of drug (eg, exinotecan) of an ADC to which an antibody is attached.
  • the DAR of an ADC can range from 1 to 10, but depending on the number of attachment sites on the antibody, higher loadings (eg 20) are also possible.
  • the term DAR may be used when referring to the amount of drug loaded onto a single antibody, or alternatively, the average or mean DAR of a group of ADCs. In some embodiments, its value is selected from 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.
  • the average binding number of the small molecule drug that is, the average drug binding number of the antibody, or called the average drug-antibody coupling ratio
  • its value is selected from about 0 to about 10, or about 2 to about 8.
  • the drug antibody conjugation ratio is about 3 to about 6.
  • the drug-to-antibody conjugation ratio is about 6 to about 8, or about 7 to about 8.
  • the DAR value can be denoted by p in this paper.
  • the DAR value of ADC can be determined by ultraviolet-visible absorption spectroscopy (UV-Vis), high-performance liquid chromatography-hydrophobic chromatography (HPLC-HIC), high-performance liquid chromatography-reversed-phase chromatography (RP-HPLC), liquid chromatography-mass spectrometry (LC-MS) and other determinations. These techniques are described in Ouyang, J. Methods Mol Biol, 2013, 1045: p.275-83.
  • the antibody described in the present invention can be any antibody suitable for the preparation of antibody drug conjugates, which can have a complete antibody structure, and can also include antibody fragments (polyclonal antibodies and monoclonal antibodies), such as Fab, Fab' , F(ab)' 2 and Fv etc.
  • Antibodies are capable of specifically binding to antigens, such as tumor-specific antigens and the like. Tumor antigens can be used to identify tumor cells, and can also be potential indicators or targets for tumor therapy. Therefore, the selection of specific antibodies is mainly based on the type of disease, as well as the target cells and tissues.
  • tumor antigens include, but are not limited to, EGFR, HER2, CD20, CD30, CD33, CD47, CD52, CD133, CEA, VEGF, TROP2, B7H3, FRalpha (FR ⁇ ), Nectin-4, B7H4, CLDN18, BMPR1B , E16, STEAP1, 0772P, MPF, Napi3b, Sema5b, PSCAhlg, ETBR, MSG783, STEAP2, TrpM4, CRIPTO, CD21, CD22, FcRH2, NCA, MDP, IL20R ⁇ , Brevican, EphB2R, ASLG659, PSCA , GEDA, BAFF-R, CD79a, CD79b, CXCR5, HLA-DOB, P2X5, CD72, LY64, FcRH1, IRTA2, TENB2, PMEL17, TMEFF1, GDNF-Ra1, Ly6E, TMEM46, Ly
  • the antibody may be a humanized monoclonal antibody.
  • the antibody is an anti-EGFR antibody, including but not limited to: cetuximab, which is a human-mouse chimeric monoclonal antibody against EGFR; panitumumab, which is a fully human monoclonal antibody; Nimotuzumab, which is a humanized monoclonal antibody against EGFR.
  • EGFR is overexpressed in many tumor tissues, such as metastatic colorectal cancer and head and neck cancer.
  • the antibody is an anti-EGFR antibody
  • the heavy chain and light chain sequences are SEQ ID NO: 1 and SEQ ID NO: 2, respectively.
  • the antibody is an anti-HER2 antibody, which can specifically act on human epidermal growth factor receptor 2, such as Trastuzumab (Trastuzumab), Pertuzumab, Margetuximab, ZW25, etc. .
  • the anti-HER2 antibody can be modified, such as one or more amino acid sequences are changed, increased or decreased, so as to achieve the corresponding purpose, such as enhancing antibody-dependent cell-mediated cytotoxicity.
  • the anti-HER2 antibody is Trastuzumab
  • the heavy chain and light chain sequences are SEQ ID NO: 3 and SEQ ID NO: 4, respectively.
  • the antibody is an anti-Trop2 antibody capable of specifically acting on the Trop2 protein, wherein the Trop2 protein is trophoblast cell surface glycoprotein antigen 2.
  • the anti-Trop2 antibody is a fully human monoclonal antibody, and in one or more embodiments, the anti-Trop2 antibody is a humanized monoclonal antibody.
  • the anti-Trop2 antibody is an antibody disclosed in the following patent documents: WO2021147993A1 (such as PD3), CN101264325B (such as RS7, hRS7), CN105849126B (such as hTINA1-H1L1, hTINA1-H2L1, hTINA1-H2L2 , hTINA1-H3L3), CN110903395A (such as M1, M2, M3), CN113896796A (such as 4D3, 7F11), US20130089872A (such as K5-70, K5-107, K5-116-2-1, T6-16, T5-86 ), US5840854A (such as BR110), US20130122020A (such as 3E9, 6G11, 7E6, 15E2, 18B1), US20120237518A (such as 77220, KM4097, KM4590).
  • WO2021147993A1 such as PD3
  • the anti-Trop2 antibodies are commercially available, including LS-C126418, LS-C178765, LS-C126416, LS-C126417 (LifeSpan BioSciences, Inc., Seattle, WA); 10428- MM01, 10428-MM02, 10428-R001, 10428-R030 (Sino Biological Inc., Beijing, China); MR54 (eBioscience, San Diego, CA); sc-376181, sc-376746, Santa Cruz Biotechnology (Santa Cruz, CA) ; MM0588-49D6 (Novus Biologicals, Littleton, CO); ab79976 and ab89928 (Cambridge, MA).
  • the anti-Trop2 antibody is the anti-Trop-2 antibody 162-25.3 and 162-46.2 or Ikeda disclosed by Lipinski et al. (1981, Proc Natl. Acad Sci USA, 78:5147-50). (2015, Biochem Biophys Res Comm 458:877-82) discloses a Pr1E11 anti-Trop-2 antibody that recognizes a unique epitope on Trop-2.
  • the antibody is an hRS9 antibody, and the heavy and light chain sequences of the antibody are SEQ ID NO: 5 and SEQ ID NO: 6, respectively.
  • the antibody is an anti-CLDN18.2 antibody or an antigen-binding unit thereof, and the anti-CLDN18.2 antibody or an antigen-binding unit thereof has one or more of the following characteristics: a) binds to CLDN18. 2 specific binding; b) high affinity; c) strong ADCC activity; d) strong CDC activity.
  • the anti-CLDN18.2 antibody or antigen-binding unit thereof is a murine antibody, a chimeric antibody or a humanized antibody.
  • the antigen-binding fragment or antigen-binding unit of an anti-CLDN18.2 antibody is a Fab, Fab', F(ab')2, Fv, disulfide-linked Fv, scFv, single domain antibody or diabodies.
  • the anti-CLDN18.2 antibody is a multispecific antibody (eg, a bispecific antibody).
  • the anti-CLDN18.2 antibody can be a monoclonal antibody.
  • the antibody comprises a heavy chain constant region, such as an IgGl, IgG2, IgG3, IgG4, IgA, IgE, IgM, or IgD constant region.
  • an anti-CLDN18.2 antibody or an antigen-binding unit thereof comprises a human IgG constant domain, a human IgA constant domain, a human IgE constant domain, a human IgM constant domain, and a human IgD constant structure domain of the immunoglobulin heavy chain constant domain.
  • the anti-CLDN18.2 antibody or antigen binding unit thereof comprises an IgG1 heavy chain constant region, an IgG2 heavy chain constant region, an IgG3 heavy chain constant region, or an IgG4 heavy chain constant region.
  • the heavy chain constant region is an IgGl heavy chain constant region or an IgG4 heavy chain constant region.
  • the antibody or antigen binding unit thereof comprises a light chain constant region, eg, a kappa light chain constant region or a lambda light chain constant region. In one or more embodiments, the antibody or antigen binding unit thereof comprises a kappa light chain constant region.
  • the anti-CLDN18.2 antibody of the present invention includes a humanized antibody or an antigen-binding unit thereof. These antibodies, or antigen-binding units thereof, are suitable for administration to a human without causing an adverse immune response in the human to the administered immunoglobulin.
  • the anti-CLDN18.2 antibody or its antigen-binding unit is selected from the anti-CLDN18.2 antibody or its antigen-binding unit described in WO2020043044, US2021403552, WO2021238831, WO2021160154, and WO2021111003.
  • the anti-CLDN18.2 antibody or its antigen-binding unit is selected from zolbetuximab, claudiximab, TST001, AB011, M108, or NBL-015 or its antigen-binding unit.
  • the anti-CLDN18.2 antibody or antigen-binding unit thereof comprises one or more of (a)-(f), wherein:
  • VH CDR1 comprising or consisting of the amino acid sequence shown in SEQ ID NO:7;
  • VH CDR2 comprising or consisting of the amino acid sequence shown in SEQ ID NO:8;
  • VH CDR3 comprising or consisting of the amino acid sequence shown in SEQ ID NO:9;
  • VL CDR1 comprising or consisting of the amino acid sequence shown in SEQ ID NO:10;
  • VL CDR2 it comprises the aminoacid sequence shown in SEQ ID NO:11 or is made up of;
  • VL CDR3 which comprises the amino acid sequence shown in SEQ ID NO: 12 or consists of it.
  • the anti-CLDN18.2 antibody or its antigen-binding unit comprises or consists of the following CDRs:
  • VH CDR1 which comprises the amino acid sequence shown in SEQ ID NO:7;
  • VH CDR2 which comprises the amino acid sequence shown in SEQ ID NO:8;
  • VH CDR3 which comprises the amino acid sequence shown in SEQ ID NO:9;
  • VL CDR1 it comprises the amino acid sequence shown in SEQ ID NO:10;
  • VL CDR2 it comprises the aminoacid sequence shown in SEQ ID NO:11;
  • VL CDR3 which comprises the amino acid sequence shown in SEQ ID NO:12.
  • the anti-CLDN18.2 antibody or its antigen binding unit comprises VH CDR1 shown in SEQ ID NO:7, VH CDR2 shown in SEQ ID NO:8, VH CDR2 shown in SEQ ID NO VH CDR3 shown in: 9, VL CDR1 shown in SEQ ID NO: 10, VL CDR2 shown in SEQ ID NO: 11 and VLCDR3 shown in SEQ ID NO: 12, or consist of it.
  • the anti-CLDN18.2 antibody or antigen-binding unit thereof is a humanized anti-CLDN18.2 antibody or antigen-binding unit thereof.
  • the heavy chain variable region of the anti-CLDN18.2 antibody or its antigen binding unit comprises a sequence as shown in SEQ ID NO: 13, or compared with the sequence shown in SEQ ID NO: 13 A sequence having at least 90% identity, or an amino acid sequence having one or more conservative amino acid substitutions compared to the sequence shown in SEQ ID NO: 13; and/or
  • the light chain variable region of the anti-CLDN18.2 antibody or antigen binding unit comprises a sequence as set forth in SEQ ID NO: 14, or a sequence having at least 90% identity compared to the sequence set forth in SEQ ID NO: 14, or An amino acid sequence having one or more conservative amino acid substitutions compared to the sequence shown in SEQ ID NO: 14.
  • the anti-CLDN18.2 antibody or an antigen-binding unit thereof comprises a heavy chain constant region comprising the amino acid sequence shown in SEQ ID NO: 15 or 16.
  • the anti-CLDN18.2 antibody or its antigen-binding unit comprises a heavy chain constant region and a light chain constant region, and the heavy chain constant region comprises an amino acid sequence as shown in SEQ ID NO: 15 ;
  • the light chain constant region comprises the amino acid sequence shown in SEQ ID NO: 17.
  • the anti-CLDN18.2 antibody or its antigen-binding unit comprises a heavy chain constant region and a light chain constant region, and the heavy chain constant region comprises an amino acid sequence as shown in SEQ ID NO: 16 ;
  • the light chain constant region comprises the amino acid sequence shown in SEQ ID NO: 17.
  • the humanized anti-CLDN18.2 antibody is H239H-2b-K-6a-1 antibody
  • the amino acid sequence of its heavy chain variable region is shown in SEQ ID NO: 13
  • the heavy chain The amino acid sequence of the constant region is shown in SEQ ID NO:15
  • the amino acid sequence of the light chain variable region is shown in SEQ ID NO:14
  • the amino acid sequence of the light chain constant region is shown in SEQ ID NO:17.
  • the humanized anti-CLDN18.2 antibody is H239H-2b-K-6a-2 antibody
  • the amino acid sequence of its heavy chain variable region is shown in SEQ ID NO: 13
  • the heavy chain The amino acid sequence of the constant region is shown in SEQ ID NO:16
  • the amino acid sequence of the light chain variable region is shown in SEQ ID NO:14
  • the amino acid sequence of the light chain constant region is shown in SEQ ID NO:17.
  • the antibody comprises a sequence that is at least 80% identical to any of the antibodies described above, or an amino acid sequence that has one or more conservative amino acid substitutions compared to any of the antibodies described above.
  • the light chain amino acid sequence of the H239H-2b-K-6a-1 antibody is shown in SEQ ID NO:20, and the heavy chain amino acid sequence is shown in SEQ ID NO:18.
  • the light chain amino acid sequence of the H239H-2b-K-6a-2 antibody is shown in SEQ ID NO:20, and the heavy chain amino acid sequence is shown in SEQ ID NO:19.
  • the antibody is an anti-B7H3 antibody or an antigen-binding unit thereof.
  • the heavy chain amino acid sequence of the anti-B7H3 antibody is shown in SEQ ID NO:21, and the light chain amino acid sequence is shown in SEQ ID NO:22.
  • the antibody is an anti-FR ⁇ antibody or an antigen binding unit thereof.
  • the heavy chain amino acid sequence of the anti-FR ⁇ antibody is shown in SEQ ID NO:23, and the light chain amino acid sequence is shown in SEQ ID NO:24.
  • Antibodies can be prepared using conventional recombinant DNA techniques. Antibody-producing vectors, cell lines, and the like can be selected, constructed, and cultured using techniques known to those skilled in the art. These techniques are described in various laboratory manuals and major publications, such as Recombinant DNA Technology for Production of Protein Therapeutics in Cultured Mammalian Cells, D.L. hacker, F.M. Wurm, in Reference Module in Life Sciences, 2017, which in its entirety includes The supplementary content is incorporated by reference in its entirety.
  • the DNA encoding the antibody can be designed and synthesized according to the amino acid sequence of the antibody described herein according to conventional methods, placed into an expression vector, and then transfected into host cells, and the transfected cells can be cultured in a culture medium. Host cells produce monoclonal antibodies.
  • an antibody expression vector includes at least one promoter element, an antibody coding sequence, a transcription termination signal, and a polyA tail. Other elements include enhancers, Kozak sequences, and donor and acceptor sites for RNA splicing flanking the inserted sequence.
  • High-efficiency transcription can be obtained through the early and late promoters of SV40, long terminal repeats from retroviruses such as RSV, HTLV1, HIVI, and early promoters of cytomegalovirus, and other cellular promoters such as muscle Kinetin promoter.
  • Suitable expression vectors may include pIRES1neo, pRetro-Off, pRetro-On, PLXSN, or pLNCX, pcDNA3.1(+/-), pcDNA/Zeo(+/-), pcDNA3.1/Hygro(+/-), PSVL, PMSG, pRSVcat, pSV2dhfr, pBC12MI and pCS2 etc.
  • Commonly used mammalian host cells include HEK293 cells, Cos1 cells, Cos7 cells, CV1 cells, mouse L cells, and CHO cells.
  • the inserted gene fragment needs to contain a selection marker, and common selection markers include dihydrofolate reductase, glutamine synthetase, neomycin resistance, hygromycin resistance and other selection genes, so that Screening and isolation of successfully transfected cells.
  • the constructed plasmid is transfected into host cells without the above-mentioned genes, and cultured in a selective medium, the successfully transfected cells grow in large numbers and produce the desired target protein.
  • Antibodies will be purified by one or more purification steps. Purification can be carried out by conventional methods, such as centrifuging the cell suspension first, collecting the supernatant, and centrifuging again to further remove impurities. Methods such as Protein A affinity column and ion exchange column can be used to purify antibody protein.
  • the number of an antibody bound to a small molecule drug in an antibody-drug conjugate is called the drug-antibody conjugation ratio (DAR).
  • DAR drug-antibody conjugation ratio
  • its value is selected from 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.
  • the average binding number of the small molecule drug that is, the average drug binding number of the antibody, or called the average drug-antibody conjugation ratio
  • its value is selected from about 0 to 10, or 2 to 8.
  • the drug-antibody coupling ratio is 3-6, and in other embodiments, the drug-antibody coupling ratio is about 6 to about 8, or about 7 to about 8.
  • the invention also provides drug conjugates, such as antibody drug conjugates, and preparation methods of intermediates.
  • drug conjugates of the present invention such as antibody drug conjugates, and intermediates can be prepared by known preparations and methods. In some embodiments, the method of preparation is as follows.
  • the first step the compound of general formula 1-1 and the compound of general formula 1-1' react under alkaline conditions to obtain the compound of general formula 1-2;
  • the second step reacting the compound of general formula 1-2 and general formula (AA) i -(FF 1 ) f under alkaline conditions in the presence of a condensing agent to obtain the compound of general formula 1-3;
  • the third step remove the amino protecting group W of the compound of general formula 1-3 to obtain the compound of general formula 1-4;
  • the fourth step the compound of general formula 1-4 and the compound of general formula 1-5 are reacted under alkaline conditions to obtain the compound of general formula 1-6;
  • the fifth step reacting the compound of general formula 1-6 and bis(p-nitrophenyl)carbonate under basic conditions to obtain the compound of general formula 1-7.
  • the first step the compound of general formula 1 and the compound of general formula 1' react under alkaline conditions to obtain the compound of general formula 2;
  • the second step the compound of general formula 2 reacts with the compound of general formula (AA) i -(FF 1 ) f under alkaline conditions in the presence of a condensing agent to obtain the compound of general formula 3;
  • the third step removing the amino protecting group W of the compound of general formula 3 to obtain the compound of general formula 4;
  • the fourth step the compound of general formula 4 and the compound of general formula 5 are reacted under alkaline conditions to obtain the compound of general formula 6;
  • the fifth step the compound of general formula 6 is reacted with bis(p-nitrophenyl)carbonate under basic conditions to obtain the compound of general formula 7.
  • W 1 is an amino protecting group, such as 9-fluorenylmethoxycarbonyl
  • W 2 is a carboxylic acid active ester, such as succinimide ester.
  • n, AA, R, i, f are as described herein above in formula II, and FF 1 is FF 2 is where * is concatenated with AA.
  • the above-mentioned basic conditions can be provided by reagents, which include organic bases and inorganic bases, and said organic bases include but not limited to triethylamine, diethylamine, N-methylmorpholine, pyridine, hexahydropyridine, N,N-diisopropylethylamine, n-butyllithium, lithium diisopropylamide, potassium acetate, sodium tert-butoxide or potassium tert-butoxide, the inorganic bases include but not limited to sodium hydride, potassium phosphate , sodium carbonate, potassium carbonate, cesium carbonate, sodium hydroxide and lithium hydroxide.
  • organic bases include but not limited to triethylamine, diethylamine, N-methylmorpholine, pyridine, hexahydropyridine, N,N-diisopropylethylamine, n-butyllithium, lithium diisopropylamide, potassium acetate, sodium
  • the above-mentioned condensing agent can be selected from N,N,N',N'-tetramethyl-O-(7-azabenzotriazol-1-yl)urea hexafluorophosphate, 4-(4,6-dimethyl Oxy-1,3,5-triazin-2-yl)-4-methylmorpholine chloride, 1-hydroxybenzotriazole and 1-(3-dimethylaminopropyl)-3-ethane Carbodiimide Hydrochloride, N,N'-Dicyclohexylcarbodiimide, N,N'-Diisopropylcarbodiimide, O-Benzotriazole-N,N,N ',N'-tetramethyluronium tetrafluoroborate, 1-hydroxybenzotriazole, 1-hydroxy-7-azobenzotriazole, O-benzotriazole-N,N,N ',N'-tetramethyluronium hexafluorophosphate
  • the compound of general formula 7 is reacted with D in the presence of a condensing agent under basic conditions to obtain the compound of general formula 8.
  • n, AA, R, i, f, FF, D are as described in formula III, and FF 2 is where * is concatenated with AA.
  • the above-mentioned basic conditions can be provided by reagents, which include organic bases and inorganic bases, and said organic bases include but not limited to triethylamine, diethylamine, N-methylmorpholine, pyridine, hexahydropyridine, N,N-diisopropylethylamine, n-butyllithium, lithium diisopropylamide, potassium acetate, sodium tert-butoxide or potassium tert-butoxide, the inorganic bases include but not limited to sodium hydride, potassium phosphate , sodium carbonate, potassium carbonate, cesium carbonate, sodium hydroxide and lithium hydroxide.
  • organic bases include but not limited to triethylamine, diethylamine, N-methylmorpholine, pyridine, hexahydropyridine, N,N-diisopropylethylamine, n-butyllithium, lithium diisopropylamide, potassium acetate, sodium
  • the above-mentioned condensing agent can be selected from N,N,N',N'-tetramethyl-O-(7-azabenzotriazol-1-yl)urea hexafluorophosphate, 4-(4,6-dimethyl Oxy-1,3,5-triazin-2-yl)-4-methylmorpholine chloride, 1-hydroxybenzotriazole and 1-(3-dimethylaminopropyl)-3-ethane Carbodiimide Hydrochloride, N,N'-Dicyclohexylcarbodiimide, N,N'-Diisopropylcarbodiimide, O-Benzotriazole-N,N,N ',N'-tetramethyluronium tetrafluoroborate, 1-hydroxybenzotriazole, 1-hydroxy-7-azobenzotriazole, O-benzotriazole-N,N,N ',N'-tetramethyluronium hexafluorophosphate
  • n, AA, R, i, f, FF, D, Abu are as described in formula I.
  • the above-mentioned weakly acidic conditions can be provided by reagents, which include organic acids and inorganic acids, and said organic acids include but are not limited to acetic acid, benzoic acid, tartaric acid, oxalic acid, malic acid, citric acid, ascorbic acid, citric acid, citrate Rhenic acid, salicylic acid, caffeic acid, sorbic acid, quinic acid, oleanolic acid, succinic acid, chlorogenic acid, formic acid, propionic acid, the inorganic acids include but not limited to carbonic acid, nitrous acid, acetic acid , hypochlorous acid, hydrofluoric acid, sulfurous acid, hydrogen sulfuric acid, silicic acid, metasilicate, phosphoric acid, metaphosphoric acid, sodium bicarbonate, sodium bisulfite.
  • organic acids include but are not limited to acetic acid, benzoic acid, tartaric acid, oxalic acid, malic acid, citric acid, ascorbic acid,
  • the drug conjugate can be purified by conventional methods, such as preparative high-performance liquid chromatography (prep-HPLC) and other methods.
  • pre-HPLC preparative high-performance liquid chromatography
  • eukaryotic cells such as HEK293 cells (Life Technologies Cat. No. 11625019) were transiently transfected, or CHO cells were stably transfected, and stable cell lines were selected for purification and expression.
  • the monoclonal antibody anti-HER2 antibody that specifically binds to the extracellular region of HER2 was produced in CHO cells.
  • the expression vector OptiCHO TM Antibody Express System (invitrogen) containing the antibody gene was constructed using conventional molecular biology methods, and CHO cells were used as host cells.
  • anti-Trop2 specific monoclonal antibody was produced in CHO cells.
  • Expression vectors containing antibody genes were constructed using conventional molecular biology methods, wherein the amino acid sequences of the heavy chain and light chain of the recombinant humanized anti-Trop2 monoclonal antibody hRS9 antibody are shown in SEQ ID NO: 5 and SEQ ID NO: 6, respectively.
  • Expression vectors containing anti-CLND18.2 antibody genes were constructed using conventional molecular biology methods, transfected into HEK293F cells, cultured and purified to obtain antibodies.
  • the relevant sequences of the anti-CLDN18.2 antibody are shown in Tables 4 and 5; wherein the light chain amino acid sequence of the H239H-2b-K-6a-1 antibody is shown in SEQ ID NO:20, and the heavy chain amino acid sequence is shown in SEQ ID NO:18
  • the light chain amino acid sequence of the H239H-2b-K-6a-2 antibody is shown in SEQ ID NO:20, and the heavy chain amino acid sequence is shown in SEQ ID NO:19.
  • Antibody name VH serial number CH serial number VL serial number CL serial number H239H-2b-K-6a-1 SEQ ID NO:13 SEQ ID NO:15 SEQ ID NO:14 SEQ ID NO:17 H239H-2b-K-6a-2 SEQ ID NO:13 SEQ ID NO:16 SEQ ID NO:14 SEQ ID NO:17

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