JP6239598B2 - 薬物複合体、複合体形成方法、およびその使用 - Google Patents
薬物複合体、複合体形成方法、およびその使用 Download PDFInfo
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- JP6239598B2 JP6239598B2 JP2015512770A JP2015512770A JP6239598B2 JP 6239598 B2 JP6239598 B2 JP 6239598B2 JP 2015512770 A JP2015512770 A JP 2015512770A JP 2015512770 A JP2015512770 A JP 2015512770A JP 6239598 B2 JP6239598 B2 JP 6239598B2
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Description
ある態様は、活性薬物複合体、活性薬物複合体の製造方法、およびその使用を提供する。
[式中、
Aは、標的部分であり、
Bは、第二の標的部分を含んでいてよい補助的部分であるか、またはBは存在せず、
L1は、少なくとも1個のN(窒素)原子を含む基を含み、
Dは、それぞれ独立して選択され、ここで、各Dは活性薬物を含み、
L2は、それぞれ独立して、リンカーであり、ここで、少なくとも1個のL2はL1に結合し、そして
nは、1、2、3、4、5、6、7、8、9または10である。]
で示される構造を有する活性薬物複合体またはその薬学的に許容される塩を提供する。
[式中、
Xが、N(窒素)またはCHであり、
Yが、N(窒素)またはCHであり、
mが、0、1、または2であり、
Lが、リンカーであるか、または存在せず、そして
L1Aが、リンカーであるか、または存在しない。]
で示される構造を有する活性薬物複合体またはその薬学的に許容される塩を提供する。
[式中、
Aは、標的部分であり、
Bは、第二の標的部分を含んでいてよい補助的部分であるか、またはBは存在せず、
Dは、それぞれ独立して選択され、ここで、各Dは活性薬物を含み、
L2は、それぞれ独立して、リンカーであり、
nは、1、2、3、4、5、6、7、8、9または10であり、XはN(窒素)またはCHであり、そしてL1Aはリンカーであるか、または存在しない。]
で示される構造を有する活性薬物複合体またはその薬学的に許容される塩を提供する。
[式中、
Aは、標的部分であり、
Bは、第二の標的部分を含んでいてよい補助的部分であるか、またはBは存在せず、
Dは、それぞれ独立して選択され、ここで、各Dは活性薬物を含み、
L2は、それぞれ独立して、リンカーであり、
nは、1、2、3、4、5、6、7、8、9または10であり、XはN(窒素)またはCHであり、そしてL1Aはリンカーであるか、または存在しない。]
で示される構造を有する活性薬物複合体またはその薬学的に許容される塩を提供する。
式I−Aのアミンを式I−Bのジアルデヒドと反応させて、
式Iaaの活性薬物複合体を得る化学的合成法を提供する。
式Iabの活性薬物複合体を得る化学的合成法を提供する。
であってよい。ある態様において、Lは、−NH−C(=O)−、−NH−C(=O)−NH−または−NH−C(=O)−O−を含む。ある態様において、Lは、−NH−C(=O)−、−NH−C(=O)−NH−または−NH−C(=O)−O−であってよい。ある態様において、Lは存在しなくてもよい。ある態様において、Lは、−C(=O)−、−NH−C(=O)−、−C(=O)−O−、−NH−C(=O)−NH−または−NH−C(=O)−O−を含む。ある態様において、Lは、−C(=O)−、−NH−C(=O)−、−C(=O)−O−、−NH−C(=O)−NH−または−NH−C(=O)−O−であってよい。ある態様において、Lは−C(=O)−であってよい。
ある態様は、活性薬物複合体を提供する。ある態様において、活性薬物複合体は、薬物複合体である。ある態様において、薬物複合体は、標的化分子を含む。ある態様において、標的化分子はモノクローナル抗体(mAB)を含む。ある態様において、薬物複合体は、スペーサーまたは多官能性リンカーを含む。ある態様において、スペーサーは、N(窒素)原子を含む基によりmABに結合している。ある態様において、多官能性リンカーは、N(窒素)原子を含む基によりmABに結合している。ある態様において、スペーサーまたは多官能性リンカーは、要すれば補助的部分(auxiliary moiety)に結合していてよい。ある態様において、補助的部分は、mABおよびペプチドのような第二の標的化分子であり得る。ある態様において、補助的部分は、ポリエチレングリコール(PEG)などのような親水性ポリマーであり得る。ある態様において、スペーサーまたは多官能性リンカーは、N(窒素)原子を含む基を含み得る。ある態様において、スペーサーまたは多官能性リンカーは、N(窒素)原子を含む環状基を含み得る。
本明細書で用いる、通常の有機化学における略語は以下に定義される。
で示される置換基としては、Aが分子の最左の結合点に結合するように、ならびにAが分子の最右の結合点に結合する場合のように配向される置換基が挙げられる。
当業者は、本明細書に記載されるいくつかの構造が、動態的にも他の化学的構造によっても正しく示され得る、化合物の共鳴構造または互変異性体であり得ることを認識するだろう。当業者は、そのような構造が、そのような化合物のサンプルの極めて少量部分を表しているだけであり得ることを理解する。そのような共鳴構造または互変異性体は本明細書中に示されないが、かかる化合物は、示される構造の範囲内であると考えられる。
いくつかの態様は、スペーサーまたは多官能性リンカーを介する標的分子の結合方法を提供する。ある態様において、スペーサーまたは多官能性リンカーは、N(窒素)原子を含む基を包含し得る。ある態様において、該方法は、単一工程または連続的結合方法を包含する。ある態様において、薬物複合体は、スペーサーまたは多官能性リンカーを包含する。ある態様において、スペーサーまたは多官能性リンカーは、ペプチドまたはジスルフィド結合のような非切断型または切断型ユニットを包含し得る。
いくつかの態様は、本明細書に開示または記載される活性薬物複合体を必要とする患者における処置方法であって、該患者にそれを投与することを含む方法を提供する。ある態様において、患者は、癌、免疫疾患、感染症または糖尿病のような代謝性疾患を有し得る。
いくつかの態様は、式I
[式中、
Aは、標的部分であり得て、
Bは、第二の標的部分を含んでいてよい補助的部分であるか、水溶性ポリマーであるか、またはBは存在せず、
L1は、1個のN(窒素)原子を含む基であり、
Dは、それぞれ独立して選択され、ここで、各Dは活性薬物であり、
L2は、それぞれ独立して、リンカーであり、ここで、少なくとも1個のL2はL1に結合し、そして
nは、1、2、3、4、5、6、7、8、9または10である。]
で示される構造を有する活性薬物複合体またはその薬学的に許容される塩を提供する。
[式中、Xは、N(窒素)、CH−またはCH−C(=O)−である。Yは、N(窒素)、CH−またはCH−CH2−である。mは、0、1、または2であり得る。そして、L1Aは、リンカーであり得るか、または存在しない。Lは、−NH−C(=O)−、−NH−C(=O)−NH−または−NH−C(=O)−O−であるが、これに限定されない。]
で示される構造を有する
を含む。
(式中、リンカーは、ペプチド、オリゴ糖、−(CH2)−、O(酸素)、S(硫黄)、−NH−、−(CH2CH2O)−、Val、Cit、PAB、Phe、Lys、D−Val、Leu、Lys、Gly、Ala、Asnなどからなる群より選択される少なくとも1個の構成成分である。)
で示される構造を有する。
一般的方法A:ある態様は、式I−Aのアミンと式I−Bのジアルデヒドを反応させて、式(Iab)の活性薬物複合体を提供することを含む化学的合成法を提供する。
などが挙げられるが、これらに限定されない。
一般的複合体形成法I:
バッファー(pH3.0−8.0)中の0.5−50mg/mLの標的分子Aの溶液に、2−6当量のジアルデヒド成分および2−50当量のNaBCNH3を添加した。反応を、0−40℃にて、0.5−50時間、緩やかに撹拌または振盪しながら行い、HIC−HPLCでモニターした。得られた粗ADC生成物に、本願出願時の技術水準の方法を用いて、脱塩、バッファー交換/製剤化、および要すれば、精製のような必要な下流工程を行った。最終ADC生成物を、HIC−HPLC、SEC、RP−HPLC、および要すればLC−MSにより同定した。平均DARを、UV吸収および/またはMS分光学により計算した。
0−30%有機溶媒含有バッファー(pH6.0−9.0)中の0.5−50mg/mLの標的分子Aの溶液に、0.1−10当量の活性カルボン酸成分を少しずつまたは連続的に添加した。反応を、0−40℃にて、0.5−50時間、緩やかに撹拌または振盪しながら行い、HIC−HPLCでモニターした。得られた粗ADC生成物に、本願出願時の技術水準の方法を用いて、脱塩、バッファー交換/製剤化、および要すれば、精製のような必要な下流工程を行った。最終ADC生成物を、HIC−HPLC、SEC、RP−HPLC、および要すればLC−MSにより同定した。平均DARを、UV吸収および/またはMS分光学により計算した。
など。
一般的合成法
一般的方法A−HATU仲介アミド結合形成
酸(アミンに対して1.1当量)の無水DMF溶液に、HATU(酸に対して1当量)およびDIEA(酸に対して2当量)を添加し、混合物を室温で1分撹拌した。次いで、混合物をアミンのDMF溶液に添加し、反応混合物を反応が完了するまで室温で撹拌した(LC/MSによりモニター)。溶媒を減圧下で除去し、残渣を所望により逆相HPLCで精製して、最終純粋生成物を得た。
無水DMF中のカルボン酸(1.1当量)、アミンおよびHOAt(1.1当量)の撹拌溶液に、DIC(1.1当量)を添加し、反応混合物を室温で撹拌した。反応が完了したら(LC/MSによりモニター)、溶媒を減圧下で除去し、残渣を所望により逆相HPLCで精製して、最終純粋生成物を得た。
酸感受性保護基含有化合物を4N HCl/ジオキサンに溶解し、混合物を室温で2時間撹拌した。次いで、溶液を減圧下で濃縮し、残渣を冷エーテルで2回洗浄した。必要であれば、逆相HPLCで精製した。
Fmoc含有化合物を2−5%ピペリジンのDMF溶液に溶解した。混合物を室温で1時間撹拌した。溶媒を減圧下で除去した。必要であれば、逆相HPLCで精製した。
アミンをDMFに溶解し、アルデヒド(5当量)を添加し、その後、ナトリウムシアノボロハイドライド(5当量)を添加した。HOAcを添加して、反応混合物のpHを4〜5に調整した。混合物を、反応が完了するまで室温で撹拌した(1〜4時間、HPLCでモニター)。必要であれば、逆相HPLCで精製した。
MeOH中のエステルの撹拌溶液に、1M LiOH水溶液を、混合物のpHが約13〜14になるまで添加し、反応混合物を、反応が完了するまで室温で撹拌した(〜16時間、HPLCでモニター)。クエン酸(〜10%水溶液)を添加して反応物を中和し、溶媒を減圧下で除去した。粗生成物を所望によりRP−HPLCで精製するかまたは次工程に直接用いた。
THF/DMF(2/1)中のアルコール/フェノールの撹拌溶液に、ビス(p−ニトロフェニル)カーボネート(3〜5当量)、続いてDIEA(2〜4当量)を添加し、反応混合物を室温で出発物質の大部分が消費されるまで撹拌した。反応の進行をLC/MSによりモニターした。粗生成物を所望によりフラッシュカラムクロマトグラフィーまたは沈殿と洗浄により精製した。
アミン含有化合物をDMFに溶解した。グルタル酸無水物(3当量)を添加し、その後、DIEA(4当量)を添加した。反応混合物を室温で出発物質の大部分が消費されるまで撹拌した。反応の進行をLC/MSによりモニターした。粗生成物をRP−HPLCにより精製して、純粋カルボン酸を得た。
アミン含有化合物をDMFに溶解し、アルキル/アリールp−ニトロフェニルカーボネート(1.5当量)を添加し、その後、DIEA(2当量)およびHOBt(触媒、5%)を添加した。反応混合物をアミンの大部分が消費されるまで室温で撹拌した。反応の進行をLC/MSによりモニターした。粗生成物を場合によりRP−HPLCにより精製して、純粋カルバメートを得た。
酸をDCMに溶解し、必要であればDMFを添加して溶解を助けた。N−ヒドロキシスクシンイミド(1.5当量)、その後、EDC.HCl(1.5当量)を添加した。反応混合物を酸の大部分が消費されるまで室温で1時間撹拌した。反応の進行をRP−HPLCでモニターした。混合物をDCMで希釈し、クエン酸(10%水溶液)および塩水で連続的に洗浄した。有機層を乾燥させ、濃縮乾固した。粗生成物を所望によりRP−HPLCまたはシリカゲルカラムクロマトグラフィーで精製した。
複合体形成法A。活性化環状カルボン酸を介するLys残基上のコンジュゲーション
環状カルボン酸部分は、環状酸が直接結合されないときでも、直鎖カルボン酸誘導体から容易に得られ得る。例えば、
工程1。薬物リンカー構築物合成(−L2−D)
薬物リンカー構築物合成の方法としては以下が挙げられるが、これに限定されない。
方法1−1:カルバメート結合を介して結合したリンカーおよび薬物。以下の一般的方法を用いた。
活性化およびカルバメート形成のために一般的方法GおよびI、さらなる誘導体化のための保護基の除去のために一般的方法C、DおよびF。
複合体形成反応に適する官能基の導入方法は、以下であるが、これらに限定されない。
方法2−1。カルボン酸を導入するために環状無水物と反応させるための遊離アミノ基担持化合物(一般的方法H)
または
アミン(NH2−Ahx−マイタンシノール)(20mg)をアセトニトリル(2mL)に溶解し、1mLのNaOAc緩衝液(100mM、pH=4.0)を添加した。ジアルデヒド(0.5M水溶液、0.2mL)、続いてNaCNBH3(10mg)を添加した。反応混合物を室温で30分間撹拌し、RP−HPLCで直接精製して、所望の酸を凍結乾燥後に、白色固体として得た(16mg)。MS実測値:790.5(M+H)+。
複合体形成反応前の最終官能基の導入方法は、以下であるが、これらに限定されない。
方法3−1。カルボン酸のその対応する活性化形態への活性化
エトキシピラン誘導体を酸水溶液で処理して、所望のジアルデヒドを得た。
スキームI。試薬および条件:i. SOCl2、EtOH;ii. DEPC、TFA、DCM;iii. TFA、DCM;iv. BrOP、DCM、DIEA;v. TFA、DCM;iv 。DIEA、DCM、HOBt。
スキームII−1。試薬および条件:i. DIC/HOAt、DMF、室温、16時間;ii. HCl/ジオキサン
スキームII−2。試薬および条件:i. DIC/HOAt、DMF、室温、16時間;ii. HCl/ジオキサン。
スキームIIC。試薬および条件:i. ビス(ニトロフェニル)カーボネート、DIEA、THF/DMF、室温;ii. 6−アミノヘキサノン酸、NaHCO3(水溶液);iii. HCl/ジオキサン(4N);iv. HCHO、NaCNBH3、DMF、HOAc;
スキームIII。試薬および条件:i. SOCl2、THF、1時間;ii. N−ヒドロキシフタルイミド、NaHCO3、DMF、室温、48時間;iii. NH2NH2.H2O、HOAc、DMF。
撹拌中のFmoc−VA−PAB(21)(Bioconjugate Chem., 2002, 13, 855-859)(9g、15mmol)のTHF溶液(200mL)に、塩化チオニル(18mmol)を滴下した。添加の完了後、反応混合物を室温で1時間撹拌した。TLC分析(酢酸エチル/ヘキサン、1/1、v/v)が、反応の完了を示した。溶媒を減圧下で除去し、残渣をヘキサン(100mL)で洗浄して、化合物22をわずかに黄色がかった固体として得た(8.8g)。
化合物25を、化合物25の合成について上記の方法を用いて、化合物Fmoc−VC−PAB(Bioconjugate Chem., 2002, 13, 855-859)から出発して合成した。C33H40N6O6のMS m/z 計算値616.3、実測値617.5([M+H]+)。
化合物26を、化合物26の合成について上記の方法を用いて、化合物 Fmoc−A−PAB(既報の方法に従い合成: Bioconjugate Chem., 2002, 13, 855-859)から出発して合成した。C25H25N3O4のMS m/z 計算値431.2、実測値432.6([M+H]+)。
化合物27を、化合物27の合成について上記の方法を用いて、化合物 Fmoc−Ahx−PABから出発して合成した。C28H31N3O4のMS m/z 計算値473.2、実測値474.3([M+H]+)。
スキームIV。試薬および条件:i. DIC、HOAt、DMF、室温;ii. ピペリジン、DMF;iii. グルタル酸無水物、DIEA、DMF、室温;iv. EDC、HOSu、DCM、DMF、室温。v. ピペリジン4−カルボン酸、NaHCO3、MeCN/水。
化合物32を、上記の一般的方法を用いて以下の通りに合成した:オーリスタチン(Auristatin)Fと化合物24との間のDIC/HOAt仲介アミド結合形成(一般的方法B)、その後の、Fmoc除去(一般的方法D)、グルタル酸無水物との反応(一般的方法H)、および酸の対応するNHSエステルへの変換(一般的方法J)。
スキームIX。試薬および条件:i. DIEA、HOBt(5%)、DMF、室温、48時間;ii. ピペリジン、DMF。
スキームV−3。試薬及び条件:i. ビス(ニトロフェニル)カーボネート、DIEA、THF/DMF、室温;ii. ピペリジン 4−カルボン酸、NaHCO3(水溶液);iii. HCl/ジオキサン(4N);iv. HCHO、NaCNBH3、DMF、HOAc。
スキームV−4。試薬および条件:i. t−ブチルブロモ酢酸、K2CO3、DMF、室温、2時間;ii. HCl/ジオキサン(4N);iii. HCHO、NaCNBH3、HOAc、DMF。
化合物60を、上記の一般的方法を用いて以下の通りに合成した:化合物59とイソニペコチン酸メチルとの間のHATU仲介アミド結合形成(一般的方法A)、次いで、鹸化して、エステルからメチル基を除去(一般的方法F)。最終化合物を逆相HPLCにより精製して、化合物60を凍結乾燥後に、白色粉末として得た。C51H83N7O13SのMS m/z 計算値1033.6、実測値1034.7([M+H]+)。
化合物61を、上記の一般的方法を用いて以下の通りに合成した:化合物59と化合物26の間のDIC/HOAt仲介アミド結合形成(一般的方法B)、次いで、Fmocの除去(一般的方法D)、酸62を用いるHATU仲介アミド化反応(一般的方法A)、および鹸化により、エステルからメチル基を徐去(一般的方法F)。最終化合物を逆相HPLCにより精製して、化合物61を凍結乾燥後に、白色粉末として得た。C65H100N10O17SのMS m/z 計算値1324.7、実測値1325.9([M+H]+)。
一般的複合体形成法II:
0−30%有機溶媒含有バッファー(pH6.0−9.0)中の0.5−50mg/mLの標的分子Aの溶液に、0.1−10当量の活性カルボン酸成分を少しずつまたは連続的に添加した。反応を、0−40℃にて、0.5−50時間、緩やかに撹拌または振盪しながら行い、HIC−HPLCでモニターした。得られた粗ADC生成物に、本願出願時の技術水準の方法を用いて、脱塩、バッファー交換/製剤化、および要すれば、精製のような必要な下流工程を行った。最終ADC生成物を、HIC−HPLC、SEC、RP−HPLC、および要すればLC−MSにより特性化した。平均DARを、UV吸収および/またはMS分光学により計算した。
抗体−薬物複合体を細胞毒性について分析した。使用した細胞株は、SK−BR−3ヒト乳腺癌(HER2三重陽性)、HCC1954ヒト腺管癌(HER2三重陽性)、MCF7ヒト乳腺癌(HER2正常)、およびMDA−MB−468ヒト乳腺癌(HER2陰性)であった。これらの細胞はATCCから入手可能であった。SK−BR−3細胞を、10%ウシ胎児血清添加マッコイ5A培地(Caisson Labs, North Logan, UT)で増殖させた。HCC1954細胞を、10%ウシ胎児血清添加RPMI−1640培地(Caisson Labs, North Logan, UT)で増殖させた。MCF7細胞およびMDA−MB−468細胞を、10%ウシ胎児血清添加DMEM/F12培地(Caisson Labs, North Logan, UT)で増殖させた。SK−BR−3細胞、MCF7細胞およびMDA−MB−468細胞を、約7,500細胞/ウェルで96ウェルプレートにプレーティングし、HCC1954細胞を、約20,000細胞/ウェルで96ウェルプレートにプレーティングした。化合物または抗体−薬物複合体を同日にデュプリケートで添加した。72時間、37℃にてインキュベーション後、CellTiter-Glo(Promega, Madison, WI)を添加し、細胞生存能を、製造者のプロトコルに記載の通りに決定した。生存能パーセントは次の通りに決定した。
生存能%=デュプリケートの平均発光値(処理ウェル)/未処理ウェルの平均発光値
Claims (6)
- 式Iab:
Aは抗体または抗体フラグメントであり、
Bは存在せず、
Dは活性薬物であり、
nは1であり、
L 1A は存在しないかまたは−(CH 2 ) n’ −、−(CH 2 CH 2 O) n” −、Val−Cit−PAB、Val−Ala−PAB、Val−Lys(Ac)−PAB、Phe−Lys−PAB、Phe−Lys(Ac)−PAB、Ala−PAB−PAB、D−Val−Leu−Lys、Gly−Gly−Arg、Ala−Ala−Asn−PAB、ペプチドおよびオリゴ糖からなる群から選択され;
L 2 は存在しないかまたは−(CH 2 ) n”’ −、−(CH 2 CH 2 O) n”” −、Val−Cit−PAB、Val−Ala−PAB、Val−Lys(Ac)−PAB、Phe−Lys−PAB、Phe−Lys(Ac)−PAB、Ala−PAB−PAB、D−Val−Leu−Lys、Gly−Gly−Arg、Ala−Ala−Asn−PAB、ペプチド、オリゴ糖、O、S、NH、Val、Cit、Ala−PAB、PAB、phe、Lys、D−Val、Leu、Lys、Gly、AlaおよびAsnからなる群から選択され;
n’、n”、およびn”’、およびn””の各々は独立して1、2、3、4、5、6、7、8、9、または10である。]
を含む、活性薬物複合体またはその薬学的に許容される塩。 - L1Aが−(CH2)n’ −、−(CH2CH2O)n” −、Val−Cit−PAB、Val−Ala−PAB、Val−Lys(Ac)−PAB、Phe−Lys−PAB、Phe−Lys(Ac)−PAB、D−Val−Leu−Lys、Gly−Gly−Arg、Ala−Ala−Asn−PAB、Ala−PAB、PAB、ペプチド、オリゴ糖およびそれらの組み合わせからなる群より選択され、ここで、n’およびn”が独立して1、2、3、4、5、6、7、8、9または10である、請求項1に記載の活性薬物複合体。
- L2がペプチド、オリゴ糖、−(CH2)−、O(酸素)、S(硫黄)、−NH−、−(CH2CH2O)−、Val、Cit、PAB、Phe、Lys、D−Val、Leu、Lys、Gly、Ala、Asn、−(CH2)n”’ 、−(CH2CH2O)n”” 、Val−Cit−PAB、Val−Ala−PAB、Val−Lys(Ac)−PAB、Phe−Lys−PAB、Phe−Lys(Ac)−PAB、D−Val−Leu−Lys、Gly−Gly−Arg、Ala−Ala−Asn−PAB、Ala−PAB、ペプチド、オリゴ糖およびそれらの組み合わせからなる群より選択される少なくとも1個の要素を含み、ここで、n”’およびn””が独立して1、2、3、4、5、6、7、8、9または10である、請求項1または2に記載の活性薬物複合体。
- L 2が、−(CH2)n”’ −、−(CH2CH2O)n”” −、Val−Cit−PAB、Val−Ala−PAB、Val−Lys(Ac)−PAB、Phe−Lys−PAB、Phe−Lys(Ac)−PAB、D−Val−Leu−Lys、Gly−Gly−Arg、Ala−Ala−Asn−PAB、Ala−PAB、PAB、ペプチド、オリゴ糖およびそれらの組み合わせからなる群より選択され、ここで、n”’およびn””が独立して1、2、3、4、5、6、7、8、9または10である、請求項1ないし3のいずれか一項に記載の活性薬物複合体。
- 式II−Aの化合物を式II−Bの化合物と反応させて、
Aは抗体または抗体フラグメントであり;
Bは存在せず;
XはNであり;
YはCであり;
Dは活性薬物であり;
nは1であり;
L 1A は存在しないかまたは−(CH 2 ) n’ −、−(CH 2 CH 2 O) n” −、Val−Cit−PAB、Val−Ala−PAB、Val−Lys(Ac)−PAB、Phe−Lys−PAB、Phe−Lys(Ac)−PAB、Ala−PAB−PAB、D−Val−Leu−Lys、Gly−Gly−Arg、Ala−Ala−Asn−PAB、ペプチドおよびオリゴ糖からなる群から選択され;
L 2 は存在しないかまたは−(CH 2 ) n”’ −、−(CH 2 CH 2 O) n”” −、Val−Cit−PAB、Val−Ala−PAB、Val−Lys(Ac)−PAB、Phe−Lys−PAB、Phe−Lys(Ac)−PAB、Ala−PAB−PAB、D−Val−Leu−Lys、Gly−Gly−Arg、Ala−Ala−Asn−PAB、ペプチド、オリゴ糖、O、S、NH、Val、Cit、Ala−PAB、PAB、phe、Lys、D−Val、Leu、Lys、Gly、AlaおよびAsnからなる群から選択され、
n’、n”、n”’およびn””の各々は独立して1、2、3、4、5、6、7、8、9、または10であり、
Gは、−F、−Cl、−Br、−I、−N3、−OR、SR、−ONRR、RC(=O)O−、およびRSO2−O−からなる群より選択され、そして
Rは、所望により置換されていてよいアルキル、所望により置換されていてよいアリール、または置換ヘテロ環である。]
請求項1に記載の活性薬物複合体を得る、化学的合成法。 - 次のものからなる群から選択される、活性薬物複合体:
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