WO2018170322A1 - Crystal forms of amino lipids - Google Patents

Crystal forms of amino lipids Download PDF

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Publication number
WO2018170322A1
WO2018170322A1 PCT/US2018/022740 US2018022740W WO2018170322A1 WO 2018170322 A1 WO2018170322 A1 WO 2018170322A1 US 2018022740 W US2018022740 W US 2018022740W WO 2018170322 A1 WO2018170322 A1 WO 2018170322A1
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Prior art keywords
salt
cocrystal
compound
polymorph
exhibits
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English (en)
French (fr)
Inventor
Orn Almarsson
Eugene Cheung
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ModernaTx Inc
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ModernaTx Inc
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Priority to EP18715414.1A priority Critical patent/EP3596042B1/en
Priority to DK18715414.1T priority patent/DK3596042T3/da
Priority to AU2018234814A priority patent/AU2018234814B2/en
Priority to JP2019550619A priority patent/JP7220154B2/ja
Priority to SI201830611T priority patent/SI3596042T1/sl
Priority to ES18715414T priority patent/ES2911186T3/es
Application filed by ModernaTx Inc filed Critical ModernaTx Inc
Priority to CA3056133A priority patent/CA3056133A1/en
Priority to US16/493,789 priority patent/US11203569B2/en
Publication of WO2018170322A1 publication Critical patent/WO2018170322A1/en
Anticipated expiration legal-status Critical
Priority to US17/525,352 priority patent/US12552738B2/en
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C229/00—Compounds containing amino and carboxyl groups bound to the same carbon skeleton
    • C07C229/02—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton
    • C07C229/04—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
    • C07C229/06—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton
    • C07C229/10—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton the nitrogen atom of the amino group being further bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings
    • C07C229/12—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton the nitrogen atom of the amino group being further bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings to carbon atoms of acyclic carbon skeletons
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
    • C07C227/14—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof
    • C07C227/16—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof by reactions not involving the amino or carboxyl groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C229/00—Compounds containing amino and carboxyl groups bound to the same carbon skeleton
    • C07C229/02—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton
    • C07C229/04—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
    • C07C229/06—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton
    • C07C229/10—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton the nitrogen atom of the amino group being further bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings
    • C07C229/16—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton the nitrogen atom of the amino group being further bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings to carbon atoms of hydrocarbon radicals substituted by amino or carboxyl groups, e.g. ethylenediamine-tetra-acetic acid, iminodiacetic acids
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C229/00—Compounds containing amino and carboxyl groups bound to the same carbon skeleton
    • C07C229/02—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton
    • C07C229/04—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
    • C07C229/24—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having more than one carboxyl group bound to the carbon skeleton, e.g. aspartic acid
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C55/00—Saturated compounds having more than one carboxyl group bound to acyclic carbon atoms
    • C07C55/02—Dicarboxylic acids
    • C07C55/06—Oxalic acid
    • C07C55/07—Salts thereof
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C65/00—Compounds having carboxyl groups bound to carbon atoms of six—membered aromatic rings and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
    • C07C65/01—Compounds having carboxyl groups bound to carbon atoms of six—membered aromatic rings and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups containing hydroxy or O-metal groups
    • C07C65/03—Compounds having carboxyl groups bound to carbon atoms of six—membered aromatic rings and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups containing hydroxy or O-metal groups monocyclic and having all hydroxy or O-metal groups bound to the ring
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
    • C07B2200/00—Indexing scheme relating to specific properties of organic compounds
    • C07B2200/13—Crystalline forms, e.g. polymorphs

Definitions

  • This disclosure relates to solid crystalline forms of each of three compounds: (1) heptadecan-9-yl 8-((2-hydroxyethyl)amino)octanoate (“Compound 1"), (2) heptadecan-9-yl 8- ((2-hydroxyethyl)(6-oxo-6-(undecyloxy)hexyl)amino)octanoate (“Compound 2”), and (3) heptadecan-9-yl 8-((2-hydroxyethyl)(8-(nonyloxy)-8-oxooctyl)amino)octanoate (“Compound 3”), and related compositions and methods.
  • This disclosure also relates to solid crystalline forms of (6Z,9Z,28Z,3 lZ)-heptatriaconta-6,9,28,31 -tetraen- 19-yl 4-(dimethylamino)butanoate
  • nucleic acids The effective targeted delivery of biologically active substances such as small molecule drugs, proteins, and nucleic acids represents a continuing medical challenge.
  • nucleic acids the delivery of nucleic acids to cells is made difficult by the relative instability and low cell permeability of such species.
  • Lipid-containing nanoparticle compositions, liposomes, and lipoplexes have proven effective as transport vehicles into cells and/or intracellular compartments for biologically active substances such as small molecule drugs, proteins, and nucleic acids.
  • Such compositions generally include one or more "cationic" and/or amino (ionizable) lipids, phospholipids including polyunsaturated lipids, structural lipids (e.g., sterols), and/or lipids containing polyethylene glycol (PEG lipids).
  • Cationic and/or ionizable lipids include, for example, amine- containing lipids that can be readily protonated.
  • lipid-containing nanoparticle compositions have been demonstrated, improvements in safety, efficacy, and specificity are still lacking.
  • physical and chemical properties of lipid materials often present challenges relating to the practice of making and using lipid-containing nanoparticles for drug delivery.
  • Long-chain amino lipids are usually viscous oils at room temperature. Solid forms of these lipids are desirable for e.g., improving handling, improving stability (such as storage stability) and/or control of physical/chemical properties, simplifying purification process, simplifying large-scale production process and/or increasing accuracy in measurements and characterization of lipids.
  • novel solid forms e.g., crystalline forms of each of three compounds (1) heptadecan-9-yl 8-((2-hydroxyethyl)amino)octanoate (“Compound 1"), (2) heptadecan-9-yl 8-((2-hydroxyethyl)(6-oxo-6-(undecyloxy)hexyl)amino)octanoate (“Compound 2”), and (3) heptadecan-9-yl 8-((2-hydroxyethyl)(8-(nonyloxy)-8-oxooctyl)amino)octanoate (“Compound 3”), the structure of each of which is provided below:
  • novel solid forms e.g., crystalline forms
  • (6Z,9Z,28Z,3 lZ)-heptatriaconta-6,9,28,31 -tetraen-19-yl 4-(dimethylamino)butanoate MC3
  • heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate (“Compound 1"), heptadecan-9-yl 8-((2-hydroxyethyl)(6-oxo-6- (undecyloxy)hexyl)amino)octanoate (“Compound 2”), or heptadecan-9-yl 8-((2-hydroxyethyl)(8- (nonyloxy)-8-oxooctyl)amino)octanoate (“Compound 3").
  • the salt or cocrystal of Compound 1, 2, or 3 has a melting point of about 50 °C or greater (e.g., about 60 °C, about 70 °C or greater). In another aspect, the salt or cocrystal of Compound 3 has a melting point of about 270 °C or greater (e.g., about 280 °C, about 290 °C or greater).
  • the salt or cocrystal of Compound 1, 2, or 3 is formed between Compound 1, 2, or 3 and a coformer compound (e.g., an acid).
  • a salt or cocrystal of (6Z,9Z,28Z,31Z)-heptatriaconta- 6,9,28,3 l-tetraen-19-yl 4-(dimethylamino)butanoate (“MC3").
  • the salt or cocrystal of MC3 has a melting point of about 150 °C or greater (e.g., about 160 °C, about 170 °C, about 180 °C or greater, about 190 °C or greater).
  • a salt or cocrystal of (6Z,9Z,28Z,31Z)-heptatriaconta-6,9,28,31-tetraen-19-yl 4- (dimethylamino)butanoate (“MC3").
  • the salt or cocrystal of MC3 has a melting point of about 50 °C or greater (e.g., about 60 °C, about 70 °C, about 80 °C or greater).
  • the salt or cocrystal of MC3 is formed between MC3 and a coformer compound (e.g., an acid).
  • this disclosure is directed to a salt or cocrystal of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate ("Compound 1”) and a compound (e.g., a coformer compound) selected from the group consisting of 4-hydroxybenzoic acid, oxalic acid, trimellitic acid, orotic acid, trimesic acid, and sulfuric acid.
  • a compound e.g., a coformer compound
  • this disclosure is directed to a salt or cocrystal of heptadecan-9-yl 8- ((2-hydroxyethyl)(6-oxo-6-(undecyloxy)hexyl)amino)octanoate ("Compound 2”) and a compound (e.g., a coformer compound) selected from the group consisting of trimesic acid, (-)- 2,3-dibenzoyl-L-tartaric acid, 4-acetamido benzoic acid, (+)-L-tartaric acid, and
  • this disclosure is directed to a salt or cocrystal of heptadecan-9-yl 8-((2-hydroxyethyl)(8-(nonyloxy)-8-oxooctyl)amino)octanoate ("Compound 3”) and trimesic acid.
  • this disclosure is directed to a salt or cocrystal of (6Z,9Z,28Z,31Z)- heptatriaconta-6,9,28,31 -tetraen-19-yl 4-(dimethylamino)butanoate ("MC3") and a compound selected from the group consisting of (+)-0,0-di-pivaloyl-D-tartaric acid (DPDT), (-)-0,0-di- pivaloyl-L-tartaric acid (DPLT), (+)-2,3-dibenzoyl-D-tartaric acid (DBDT), and trimesic acid.
  • DPDT (+)-0,0-di-pivaloyl-D-tartaric acid
  • DPLT (-)-0,0-di- pivaloyl-L-tartaric acid
  • DBDT (+)-2,3-dibenzoyl-D-tartaric acid
  • this disclosure is directed to a salt or cocrystal of (6Z,9Z,28Z,31Z)- heptatriaconta-6,9,28,31 -tetraen-19-yl 4-(dimethylamino)butanoate (“MC3”) and trimesic acid.
  • MC3 4-(dimethylamino)butanoate
  • the salts or cocrystals disclosed herein may comprise Compound 1 (or Compound 2 or 3) and the coformer compound (e.g., an acid), within a ratio of from about 1 :0.2 mol/mol (i.e., 5: 1 mol/mol) to 1 : 5 mol/mol or from about 1 :0.5 mol/mol (i.e., 2: 1 mol/mol) to 1 :2 mol/mol, or within the range of from 1 :0.4 mol/mol (i.e., 2.5: 1 mol/mol) to 1 : 1.1 mol/mol.
  • the coformer compound e.g., an acid
  • the salts or cocrystals disclosed herein may comprise (6Z,9Z,28Z,31Z)-heptatriaconta- 6,9,28,3 l-tetraen-19-yl 4-(dimethylamino)butanoate (“MC3”) and the coformer compound (e.g., an acid), within a ratio of from about 1 :0.5 mol/mol (i.e., 2: 1 mol/mol) to 1 :2 mol/mol.
  • the ratio is about 1 : 1.2 mol/mol, about 1 : 1.1 mol/mol, or about 1 : 1.5 mol/mol).
  • the salts or cocrystals disclosed herein may be anhydrous and/or essentially solvent- free form, or be in hydrate and/or solvate form.
  • 4-hydroxybenzoate of Compound 1 is anhydrous.
  • Compound 1 orotate may be anhydrous or in a hydrate or solvate form.
  • trimesate of MC3 may be anhydrous or in a hydrate or solvate form.
  • the salts or cocrystals disclosed herein may be non-hygroscopic.
  • the 4-hydroxybenzoate of Compound 1 is non-hygroscopic.
  • the trimesate of MC3 is non-hygroscopic.
  • salts or cocrystals can be obtained in the form of different polymorphs.
  • 4-hydroxybenzoate of Compound 1 has at least two polymorphs, Polymorphs A and B.
  • orotate of Compound 1 has at least two polymorphs, Polymorphs A and B.
  • orotate of Compound 7 has at least two polymorphs, Polymorphs A and B.
  • trimesate of Compound 3 has at least two polymorphs, Polymorphs A and B.
  • trimesate of MC3 has at least two polymorphs, Polymorphs A and B [019]
  • the polymorphs disclosed herein may be substantially pure, i.e., substantially free of impurities.
  • Non-limiting examples of impurities include other polymorph forms, or residual organic and inorganic molecules such as related impurities (e.g., intermediates used to make the compounds), solvents, water or salts.
  • related impurities e.g., intermediates used to make the compounds
  • solvents e.g., water or salts.
  • substantially pure or substantially free of impurities means there is not a significant amount of impurities (e.g., other polymorph forms, or residual organic and inorganic molecules such as related impurities, solvents, water or salts) present in a sample of the salt, cocrystal, or polymorph.
  • a salt, cocrystal, or polymorph disclosed herein contains less than 10% weight by weight (wt/wt) total impurities, less than 5% wt/wt total impurities, less than 2% wt/wt total impurities, less than 1% wt/wt total impurities, less than 0.5% wt/wt total impurities, or not a detectable amount of impurities.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 is substantially free of impurities, meaning there is not a significant amount of impurities present in the sample of Polymorph A.
  • Polymorph A is a crystalline solid substantially free of Compound 1 (or any of its amorphous salt forms).
  • Polymorph A is a crystalline solid substantially free of other polymorphs of 4-hydroxybenzoate of Compound 1 and substantially free of amorphous Compound 1 (or any of its amorphous salt forms).
  • Polymorph A is a crystalline solid substantially free of Polymorph B of 4- hydroxybenzoate of Compound 1 and substantially free of amorphous Compound 1 (or any of its amorphous salt forms).
  • a solid sample of Polymorph A may also include other polymorphs (e.g., Polymorph B), and/or amorphous Compound 1 (or any of its amorphous salt forms).
  • Polymorph A of 4-hydroxybenzoate of Compound 1 can be defined according to its X-ray powder diffraction pattern. Accordingly, in one embodiment, Polymorph A exhibits an X- ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 4.5, 6.8, 9.1, and 11.4. In one embodiment, Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 1. In another embodiment, Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table I.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 can also be defined according to its differential scanning calorimetry thermogram.
  • the polymorph exhibits a differential scanning calorimetry thermogram showing a primary endotherm expressed in units of °C at a temperature of 103 +/- 2 °C and a second primary endotherm expressed in units of °C at a temperature of 68 +/- 2 °C.
  • Polymorph A exhibits a differential scanning calorimetry thermogram substantially in accordance with the lower curve shown in Figure 3.
  • Polymorph B of Compound 1 orotate is substantially free of impurities (e.g., phase or form impurities), meaning there is not a significant amount of impurities present in the sample of Polymorph B.
  • Polymorph B is a crystalline solid substantially free of amorphous Compound 1 (or any of its amorphous salt forms).
  • Polymorph B is a crystalline solid substantially free of other polymorphs of Compound 1 orotate and substantially free of amorphous Compound 1 (or any of its amorphous salt forms).
  • Polymorph B is a crystalline solid substantially free of Polymorph A of Compound 1 orotate and substantially free of amorphous Compound 1 (or any of its amorphous salt forms).
  • a solid sample of Polymorph B of Compound 1 orotate may also include other polymorphs (e.g., Polymorph A), and/or amorphous Compound 1 (or any of its amorphous salt forms).
  • Polymorph B of Compound 1 orotate can be defined according to its X-ray powder diffraction pattern. Accordingly, in one embodiment, Polymorph B exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four, or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 5.1, 7.5, 10.1, 12.7, 15.2, and 17.8. In one embodiment, Polymorph B exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 18, upper profile. In another embodiment, Polymorph B exhibits an X- ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table III.
  • Polymorph B of trimesate of Compound 3 is substantially free of impurities, meaning there is not a significant amount of impurities present in the sample of Polymorph B.
  • Polymorph B is a crystalline solid substantially free of
  • Polymorph B is a crystalline solid substantially free of other polymorphs of trimesate of Compound 3 and substantially free of amorphous trimesate of Compound 3 (or any of its amorphous salt forms).
  • Polymorph B is a crystalline solid substantially free of Polymorph A of trimesate of Compound 3 and substantially free of amorphous trimesate of Compound 3 (or any of its amorphous salt forms).
  • a solid sample of Polymorph B may also include other polymorphs (e.g., Polymorph A) and/or amorphous Compound 3 (or any of its amorphous salt forms).
  • Polymorph B of Compound 3 trimesate can be defined according to its X-ray powder diffraction pattern. Accordingly, Polymorph B of Compound 3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four or more characteristic peaks expressed in degrees 2-theta (+/- 0.4) at 6.2, 10.8, 16.5, and 26.7. In one embodiment, Polymorph B exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 48. In another embodiment, Polymorph B exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table XII.
  • Polymorph B of trimesate of Compound 3 is identifiable on the basis of a characteristic peak observed in a differential scanning calorimetry thermogram.
  • the polymorph exhibits a differential scanning calorimetry thermogram showing a characteristic melting endotherm peak expressed in units of °C with an onset temperature of about 305 +/- 2 °C.
  • the polymorph exhibits a differential scanning calorimetry thermogram showing a second primary endotherm expressed in units of °C at a temperature of 240 +/- 2 °C.
  • the polymorph exhibits a differential scanning calorimetry thermogram substantially in accordance with Figure 49.
  • Polymorph A of trimesate of MC3 is substantially free of impurities, meaning there is not a significant amount of impurities present in the sample of Polymorph A.
  • Polymorph A is a crystalline solid substantially free of MC3 (or any of its amorphous salt forms).
  • Polymorph A is a crystalline solid substantially free of other polymorphs of trimesate of MC3 and substantially free of amorphous MC3 (or any of its amorphous salt forms).
  • Polymorph A is a crystalline solid substantially free of Polymorph B of trimesate of MC3 and substantially free of amorphous MC3
  • Polymorph A may also include other polymorphs (e.g., Polymorph B), and/or amorphous MC3 (or any of its amorphous salt forms).
  • Polymorph A of MC3 trimesate can be defined according to its X-ray powder diffraction pattern. Accordingly, Polymorph A of MC3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four or more characteristic peaks expressed in degrees 2-theta (+/- 0.4) at 5.2, 7.8, 10.4, 18.3, 20.9, 23.6, or 26.2. In one embodiment, Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 52. In another embodiment, Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table XIII.
  • Polymorph A of MC3 trimesate can also be defined according to its differential scanning calorimetry thermogram.
  • the polymorph exhibits a differential scanning calorimetry thermogram showing a primary endotherm expressed in units of °C at a temperature of 184 +/- 2 °C.
  • the polymorph exhibits a differential scanning calorimetry thermogram showing a primary endotherm expressed in units of °C at a temperature of 186 +/- 2 °C and a second primary endotherm expressed in units of °C at a temperature of 90 +/- 2 °C.
  • the polymorph exhibits a differential scanning calorimetry thermogram substantially in accordance with Figure 53 or Figure 54.
  • Polymorph B of MC3 trimesate can be defined according to its X-ray powder diffraction pattern. Accordingly, Polymorph B of MC3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four or more characteristic peaks expressed in degrees 2-theta (+/- 0.4) at 4.8, 5.4, 7.2, 9.7, 12.1, 14.5, 17.0, 19.4, 21.9, 24.3, 26.8, 29.3, or 31.8. In one embodiment, Polymorph B exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 59. In another embodiment, Polymorph B exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table XIV.
  • Polymorph B of MC3 trimesate can also be defined according to its differential scanning calorimetry thermogram.
  • the polymorph exhibits a differential scanning calorimetry thermogram showing a primary endotherm expressed in units of °C at a temperature of 187 +/- 2 °C.
  • the polymorph exhibits a differential scanning calorimetry thermogram substantially in accordance with Figure 60.
  • Another aspect of the disclosure relates to the preparation of the salt or cocrystal of heptadecan-9-yl 8-((2-hydroxyethyl)amino)octanoate ("Compound 1”) and a compound selected from the group consisting of 4-hydroxybenzoic acid, oxalic acid, trimellitic acid, orotic acid, trimesic acid, and sulfuric acid.
  • Compound 2 a method for preparing the salt or cocrystal of heptadecan-9-yl 8- ((2-hydroxyethyl)(6-oxo-6-(undecyloxy)hexyl)amino)octanoate
  • Compound 2 a compound selected from the group consisting of trimesic acid, (-)-2,3-dibenzoyl-L-tartaric acid, 4-acetamido benzoic acid, (+)-L-tartaric acid, and methanesulfonic acid.
  • This disclosure also provides a method of preparing the salt or cocrystal of heptadecan-9- yl 8-((2-hydroxyethyl)(8-(nonyloxy)-8-oxooctyl)amino)octanoate ("Compound 3”) and trimesic acid.
  • This disclosure also provides a method of preparing the salt or cocrystal of
  • a process of synthesizing Compound 2, Compound 3, or an analog thereof by reacting a salt or cocrystal of Compound 1 disclosed herein with a suitable electrophile, such as an ester substituted with a halogen (e.g., Br or I).
  • a suitable electrophile such as an ester substituted with a halogen (e.g., Br or I).
  • Also provided herein is a process of purifying Compound 1, 2, or 3 by forming a salt or cocrystal thereof disclosed herein to separate the salt or cocrystal thereof from the impurities.
  • the method may further comprise neutralizing the salt or cocrystal to convert to Compound 1, 2, or 3 (i.e., a free base).
  • the process of the present disclosure is advantageous as compared to other processes in that the process of the disclosure produces Compound 1, 2, or 3 or a salt or cocrystal thereof at a large scale and/or at a high purity, e.g., such that cumbersome purification (e.g., column chromatography, extraction, phase separation, distillation and solvent evaporation) is not needed.
  • the process of the present disclosure is able to process at least 100 g, 200 g, 500 g, or more (e.g., 1 kg, 2 kg, 5 kg, 10 kg, 20 kg, 50 kg, 100 kg, 200 kg, 500 kg, or 1000 kg or more) Compound 1, 2, or 3 or a salt or cocrystal thereof.
  • the process of the present disclosure is able to produce Compound 1 , 2, or 3 or a salt or cocrystal thereof at least at a purity of at least 75%, 80%, 85%, 90%, 95%, 96%, 97%, 98%, 99%, or 99.5%, or higher.
  • the process of the present disclosure is able to produce Compound 1, 2, or 3 or a salt or cocrystal thereof with little or no impurity.
  • the impurity produced in the process of the present disclosure even if produced, is easy to be separated from Compound 1, 2, or 3 or a salt or cocrystal thereof, without cumbersome purification (e.g., column chromatography, extraction, phase separation, distillation and solvent evaporation).
  • Figure 1 depicts a representative X-ray powder diffraction (XRPD) pattern overlay of heptadecan-9-yl 8-((2-hydroxyethyl)amino)octanoate 4-hydroxybenzoate Polymorph A batches, i.e., 100 mg and 10 mg batches or batches Nos. 1 and 2.
  • XRPD X-ray powder diffraction
  • Figure 2 depicts a 3 ⁇ 4 NMR spectrum of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate 4-hydroxybenzoate Polymorph A, batch No. 2.
  • FIG. 3 depicts thermo-gravimetric analysis (TGA) and differential scanning
  • Figure 4 depicts cyclic DSC data for heptadecan-9-yl 8-((2-hydroxyethyl)amino)octanoate 4-hydroxybenzoate Polymorph A, batch No. 2.
  • Figure 5 depicts a representative XRPD pattern overlay of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate 4-hydroxybenzoate Polymorph A (i.e., Type A in the figure), batch No. 2, before and after heating.
  • Figure 6 depicts TGA and DSC data for heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate 4-hydroxybenzoate Polymorph A, batch No. 1.
  • Figure 7 depicts variable temperature X-ray powder diffraction (VT-XRPD) pattern overlay of heptadecan-9-yl 8-((2-hydroxyethyl)amino)octanoate 4-hydroxybenzoate Polymorph
  • Type A ref. in this figure is heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate 4-hydroxybenzoate Polymorph A, batch No. 2.
  • Figure 8 depicts dynamic vapor sorption (DVS) data at 25 °C for heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate 4-hydroxybenzoate Polymorph A, batch No. 1.
  • Figure 9 depicts an XRPD pattern overlay of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate 4-hydroxybenzoate Polymorph A, batch No. 1, before and after
  • Figure 10 depicts a polarized light microscopy (PLM) image for heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate 4-hydroxybenzoate Polymorph A, batch No. 1.
  • PLM polarized light microscopy
  • Figure 11 depicts a representative XRPD pattern overlay of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate trimellitate Polymorph A batches, i.e., 100 mg and 10 mg batches or batches Nos. 1 and 2.
  • Figure 12 depicts an 3 ⁇ 4 NMR spectrum of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate trimellitate Polymorph A, batch No. 2.
  • Figure 13 depicts TGA and DSC data for heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate trimellitate Polymorph A, batch No. 1.
  • Figure 14 depicts a VT-XRPD pattern overlay of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate trimellitate Polymorph A batch No. 1 , before and after heating.
  • Figure 15 depicts DVS data at 25 °C for heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate trimellitate Polymorph A, batch No. 1.
  • Figure 16 depicts an XRPD pattern overlay of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate trimellitate Polymorph A, batch No. 1, before and after DVS.
  • Figure 17 depicts a polarized light microscopy (PLM) image for heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate trimellitate Polymorph A, batch No. 1.
  • Figure 18 depicts a representative XRPD pattern overlay of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate orotate Polymorphs A and B.
  • Figure 19 depicts an 3 ⁇ 4 NMR spectrum of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate orotate Polymorph A.
  • Figure 20 depicts TGA and DSC data for heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate orotate Polymorph A.
  • Figure 21 depicts a VT-XRPD pattern overlay of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate orotate Polymorph A, before and after heating.
  • Figure 22 depicts heating-cooling DSC curve for heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate orotate Polymorph A.
  • Figure 23 depicts TGA and DSC data for heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate orotate Polymorphs B.
  • Figure 24 depicts cyclic DSC data for heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate orotate Polymorphs B.
  • Figure 25 depicts an XRPD pattern overlay of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate orotate Polymorph B, before and after cyclic DSC.
  • Figure 26 depicts DVS data at 25 °C for heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate orotate Polymorphs B.
  • Figure 27 depicts an XRPD pattern overlay of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate orotate Polymorph B, before and after DVS.
  • Figure 28 depicts a PLM image of heptadecan-9-yl 8-((2-hydroxyethyl)amino)octanoate orotate Polymorph B.
  • Figure 29 depicts a PLM image of heptadecan-9-yl 8-((2-hydroxyethyl)amino)octanoate sulfate Polymorph A.
  • Figure 30 depicts an XRPD pattern of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate sulfate Polymorph A.
  • Figure 31 depicts TGA and DSC data of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate sulfate Polymorph A.
  • Figure 32 depicts an XRPD pattern of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate trimesate Polymorph A.
  • Figure 33 depicts an 3 ⁇ 4 NMR overlay of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate trimesate and freebase.
  • Figure 34 depicts TGA data of heptadecan-9-yl 8-((2-hydroxyethyl)amino)octanoate.
  • Figure 35 depicts cyclic DSC data of heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate (heating/cooling rate: 10 °C/min).
  • Figure 36 depicts an XRPD pattern overlay of heptadecan-9-yl 8-((2-hydroxyethyl)(6- oxo-6-(undecyloxy)hexyl)amino)octanoate dibenzoyl-L-tartrate Polymorph A and the corresponding acid, dibenzoyl-L-tartaric acid.
  • Figure 37 depicts TGA and DSC data for heptadecan-9-yl 8-((2-hydroxyethyl)(6-oxo-6- (undecyloxy)hexyl)amino)octanoate dibenzoyl-L-tartrate Polymorph A.
  • Figure 38 depicts an XRPD pattern overlay of heptadecan-9-yl 8-((2-hydroxyethyl)(6- oxo-6-(undecyloxy)hexyl)amino)octanoate trimesate Polymorph A and the corresponding acid, trimesic acid.
  • Figure 39 depicts TGA and DSC data for heptadecan-9-yl 8-((2-hydroxyethyl)(6-oxo-6- (undecyloxy)hexyl)amino)octanoate trimesate Polymorph A.
  • Figure 40 depicts an XRPD pattern overlay of heptadecan-9-yl 8-((2-hydroxyethyl)(6- oxo-6-(undecyloxy)hexyl)amino)octanoate L-tartrate Polymorph A and the corresponding acid, L- tartaric acid.
  • Figure 41 depicts TGA and DSC data for heptadecan-9-yl 8-((2-hydroxyethyl)(6-oxo-6- (undecyloxy)hexyl)amino)octanoate L-tartrate Polymorph A.
  • Figure 42 depicts an XRPD pattern of heptadecan-9-yl 8-((2-hydroxyethyl)(6-oxo-6- (undecyloxy)hexyl)amino)octanoate mesylate Polymorph A.
  • Figure 43 depicts TGA and DSC data for heptadecan-9-yl 8-((2-hydroxyethyl)(6-oxo-6- (undecyloxy)hexyl)amino)octanoate mesylate Polymorph A.
  • Figure 44 depicts an XRPD pattern overlay of heptadecan-9-yl 8-((2-hydroxyethyl)(6- oxo-6-(undecyloxy)hexyl)amino)octanoate 4-acetamido benzoate Polymorph A and the corresponding acid, 4-acetamido benzoic acid.
  • Figure 45 depicts TGA and DSC data for heptadecan-9-yl 8-((2-hydroxyethyl)(6-oxo-6- (undecyloxy)hexyl)amino)octanoate 4-acetamido benzoate Polymorph A.
  • Figure 46 depicts an XRPD pattern overlay of heptadecan-9-yl 8-((2-hydroxyethyl)(8- (nonyloxy)-8-oxooctyl)amino)octanoate trimesate Polymorph A and the corresponding acid, trimesic acid.
  • Figure 47 depicts TGA and DSC data for heptadecan-9-yl 8-((2-hydroxyethyl)(8- (nonyloxy)-8-oxooctyl)amino)octanoate trimesate Polymorph A.
  • Figure 48 depicts an XRPD pattern of heptadecan-9-yl 8-((2-hydroxyethyl)(8- (nonyloxy)-8-oxooctyl)amino)octanoate trimesate Polymorph B.
  • Figure 49 depicts TGA and DSC data for heptadecan-9-yl 8-((2-hydroxyethyl)(8- (nonyloxy)-8-oxooctyl)amino)octanoate trimesate Polymorph B.
  • Figure 50 depicts an 3 ⁇ 4 NMR overlay of heptadecan-9-yl 8-((2-hydroxyethyl)(8-
  • Figure 51 is a polarized light microscopy (PLM) image of heptadecan-9-yl 8-((2- hydroxyethyl)(8-(nonyloxy)-8-oxooctyl)amino)octanoate trimesate Polymorph B.
  • PLM polarized light microscopy
  • Figure 52 is an XRPD pattern of (6Z,9Z,28Z,3 lZ)-heptatriaconta-6,9,28,31 -tetraen- 19-yl
  • Figure 53 depicts TGA and DSC data for (6Z,9Z,28Z,3 lZ)-heptatnaconta-6,9,28,31 - tetraen- 19-yl 4-(dimethylamino)butanoate trimesate Type A polymorph prepared with cyclohexane.
  • Figure 54 depicts TGA and DSC data for (6Z,9Z,28Z,3 lZ)-heptatnaconta-6,9,28,31 - tetraen- 19-yl 4-(dimethylamino)butanoate trimesate Type A polymorph prepared with EtOAc.
  • Figure 55 is a polarized light microscopy (PLM) image of (6Z,9Z,28Z,31Z)- heptatriaconta-6,9,28,31 -tetraen- 19-yl 4-(dimethylamino)butanoate trimesate Type A polymorph prepared with cyclohexane.
  • PLM polarized light microscopy
  • Figure 56 is a polarized light microscopy (PLM) image of (6Z,9Z,28Z,31Z)- heptatriaconta-6,9,28,31 -tetraen- 19-yl 4-(dimethylamino)butanoate trimesate Type A polymorph prepared with EtOAc.
  • PLM polarized light microscopy
  • Figure 57 depicts DVS data at 25 °C for (6Z,9Z,28Z,3 lZ)-heptatnaconta-6,9,28,31 - tetraen-19-yl 4-(dimethylamino)butanoate trimesate Type A polymorphs before and after DVS.
  • Figure 58 is an XRPD pattern overlay of (6Z,9Z,28Z,31Z)-heptatriaconta-6,9,28,31- tetraen-19-yl 4-(dimethylamino)butanoate trimesate Type A polymorphs before and after DVS.
  • Figure 59 is an XRPD pattern of (6Z,9Z,28Z,31Z)-heptatriaconta-6,9,28,31-tetraen-19-yl 4-(dimethylamino)butanoate trimesate Type B polymorph.
  • Figure 60 depicts TGA and DSC data for (6Z,9Z,28Z,31Z)-heptatnaconta-6,9,28,31 - tetraen-19-yl 4-(dimethylamino)butanoate trimesate Type B.
  • Figure 61 is a polarized light microscopy (PLM) image of (6Z,9Z,28Z,31Z)- heptatriaconta-6,9,28,31 -tetraen-19-yl 4-(dimethylamino)butanoate trimesate Type B polymorph.
  • PLM polarized light microscopy
  • the solid form (e.g., crystal state) of a compound may be important when the compound is used for pharmaceutical purposes. Compared with an amorphous solid or viscous oil, the physical properties of a crystalline compound are generally enhanced. These properties change from one solid form to another, which may impact its suitability for pharmaceutical use.
  • different solid forms of a crystalline compound may incorporate different types and/or different amounts of impurities.
  • Different solid forms of a compound may also have different chemical stability upon exposure to heat, light and/or moisture (e.g., atmospheric moisture) over a period of time, or different rates of dissolution.
  • Long-chain amino lipids are usually oils at room temperature. Solid forms of these lipids are desirable for e.g., improving handling, improving stability (such as storage stability), simplifying purification process, simplifying large-scale production process and/or increasing accuracy in measurements and characterization of lipids.
  • novel solid forms e.g., crystalline forms
  • (6Z,9Z,28Z,3 lZ)-heptatriaconta-6,9,28,31 -tetraen-19-yl 4-(dimethylamino)butanoate (“MC3").
  • salt or cocrystal of Compound 1 , 2, or 3 which has a melting point of about 50 °C or greater (e.g., about 60 °C, about 70 °C or greater).
  • the salt or cocrystal of Compound 1 , 2, or 3 is formed between Compound 1, 2, or 3 and a coformer compound (e.g., an acid).
  • the salt or cocrystal of Compound 3 has a melting point of about 270 °C or greater (e.g., about 280 °C, about 290 °C or greater).
  • Compound 1 refers to heptadecan-9-yl 8-((2- hydroxyethyl)amino)octanoate
  • Compound 2 refers to heptadecan-9-yl 8-((2-hydroxyethyl)(6- oxo-6-(undecyloxy)hexyl)amino)octanoate
  • Compound 3 refers to heptadecan-9-yl 8-((2- hydroxyethyl)(8-(nonyloxy)-8-oxooctyl)amino)octanoate.
  • Compound 1 can be used as a starting material for the synthesis of Compound 2 or 3.
  • MC 3 refers to (6Z,9Z,28Z,31Z)-heptatnaconta-6,9,28,31-tetraen-19-yl 4-(dimethylamino)butanoate.
  • this disclosure is directed to a salt or cocrystal of Compound 1 and a compound selected from the group consisting of 4-hydroxybenzoic acid, oxalic acid, trimellitic acid, orotic acid, trimesic acid, and sulfuric acid.
  • the compound is 4- hydroxybenzoic acid.
  • the compound is oxalic acid.
  • a salt or cocrystal of Compound 1 e.g., Polymorphs A and B of 4-hydroxybenzoate of Compound 1, or Polymorphs A and B of orotate of Compound 1.
  • this disclosure is directed to a salt or cocrystal of (6Z,9Z,28Z,31Z)- heptatriaconta-6,9,28,31-tetraen-19-yl 4-(dimethylamino)butanoate ("MC3").
  • the salt or cocrystal of MC3 has a melting point of about 150 °C or greater (e.g., about 160 °C, about 170 °C, about 180 °C or greater, about 190 °C or greater).
  • the salt or cocrystal of MC3 has a melting point of about 50 °C or greater (e.g., about 60 °C, about 70 °C, about 80 °C or greater).
  • the salt or cocrystal of MC3 is formed between MC3 and a coformer compound (e.g., an acid).
  • polymorphs of one another.
  • polymorphism is affected by the ability of a molecule of a substance (or its salt, cocrystal, or hydrate) to change its conformation or to form different intermolecular or intra-molecular interactions, (e.g., different hydrogen bond configurations), which is reflected in different atomic arrangements in the crystal lattices of different polymorphs.
  • morphology the overall external form of a substance is known as "morphology,” which refers to the external shape of the crystal and the planes present, without reference to the internal structure.
  • a particular crystalline polymorph can display different morphology based on different conditions, such as, for example, growth rate, stirring, and the presence of impurities.
  • the different polymorphs of a substance may possess different energies of the crystal lattice and, thus, in solid state they can show different physical properties such as form, density, melting point, color, stability, solubility, dissolution rate, etc., which can, in turn, effect the stability, dissolution rate and/or bioavailability of a given polymorph and its suitability for use as a pharmaceutical and in pharmaceutical compositions.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 has a number of advantageous physical properties over its free base form, as well as other salts of the free base.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 has low hygroscopicity compared to other salt forms of Compound 1. More particularly, Polymorph A of 4-hydroxybenzoate of
  • Compound 1 has low hygroscopicity compared to Polymorph A of Compound 1 trimellitate and Polymorph B of Compound 1 orotate (see, e.g., Table 1-2). Crystal forms that are highly hygroscopic may also be unstable, as the compound's dissolution rate (and other physico- chemical properties) may change as it is stored in settings with varying humidity. Also, hygroscopicity can impact large-scale handling and manufacturing of a compound, as it can be difficult to determine the true weight of a hygroscopic agent when using it for reactions or when preparing a pharmaceutical composition comprising that agent.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 is identifiable on the basis of characteristic peaks in an X-ray powder diffraction analysis.
  • X-ray powder diffraction pattern also referred to as XRPD pattern
  • Polymorph A of 4-hydroxybenzoate of Compound 1 exhibits an X-ray powder diffraction (XRPD) pattern obtained using Cu Ka radiation, having from two (2) to seven (7) characteristic peaks expressed in degrees 2-theta at 4.5, 6.8, 9.1, 11.4, 13.7, 18.3, 20.1, and 20.6.
  • 2-theta values may vary from ⁇ 0.1 to ⁇ 0.2. Such slight variation can be caused, for example, by sample preparation, instrument configurations and other experimental factors. The skilled artisan appreciates that such variation in values are greatest with low 2-theta values, and least with high 2-theta values. The skilled artisan recognizes that different instruments may provide substantially the same XRPD pattern, even though the 2-theta values vary slightly. Moreover, the skilled artisan appreciates that the same instrument may provide substantially the same XRPD pattern for the same or different samples even though the
  • XRPD patterns of the same sample may exhibit variations in peak intensity at the different 2-theta values.
  • XRPD patterns of different samples of the same polymorph may also exhibit variations in peak intensity at the different 2-theta values.
  • XRPD patterns can be substantially the same pattern even though they have corresponding 2-theta signals that vary in their peak intensities.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 exhibits an X- ray powder diffraction pattern obtained using Cu Ka radiation, having two or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 4.5, 6.8, 9.1, and 11.4.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having three or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 4.5, 6.8, 9.1, 11.4, and 13.7.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having four or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 4.5, 6.8, 9.1, 11.4, and 13.7.
  • Polymorph A of 4- hydroxybenzoate of Compound 1 exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having characteristic peaks expressed in degrees 2-theta (+/- 0.2) at 4.5, 6.8, 9.1, 11.4, 13.7, 18.3, 20.1, and 20.6.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four, or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 4.5, 6.8, 9.1, 11.4, and 13.7.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having at least eight characteristic peaks expressed in degrees 2-theta (+/- 0.2), selected from the group consisting of 4.5, 6.8, 9.1, 11.4, 13.7, 16.0, 18.3, 20.1, and 20.6.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having at least nine characteristic peaks expressed in degrees 2-theta (+/- 0.2), selected from the group consisting of 4.5, 6.8, 9.1, 11.4,
  • Polymorph A of 4- hydroxybenzoate of Compound 1 exhibits an X-ray powder diffraction pattern obtained using Cu
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 1.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table I below.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 is identifiable on the basis of a characteristic peak observed in a differential scanning calorimetry thermogram.
  • Differential scanning calorimetry, or DSC is a thermoanalytical technique in which the difference in the amount of heat required to increase the temperature of a sample and reference is measured as a function of temperature.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 exhibits a differential scanning calorimetry thermogram showing a characteristic primary endotherm peak expressed in units of °C with an onset temperature of about 103 +/- 2 °C.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 exhibits a differential scanning calorimetry thermogram showing a characteristic second primary endotherm expressed in units of °C with an onset temperature of about 68 +/- 2 °C.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 exhibits a differential scanning calorimetry thermogram substantially in accordance with the lower curve shown in Figure 3.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 wherein the solid form undergoes a weight increase of less than 1.5% (e.g., less than 1%, or less than 0.6%) upon increasing relative humidity from 5.0% to 95.0% at e.g., 25 °C.
  • Polymorph A of 4-hydroxybenzoate of Compound 1 is
  • Polymorph A of 4-hydroxybenzoate of Compound 1 is substantially free of impurities, meaning there is not a significant amount of impurities present in the sample of Polymorph A.
  • Polymorph A is a crystalline solid substantially free of amorphous Compound 1 (or any of its amorphous salt forms).
  • Polymorph A is a crystalline solid substantially free of other polymorphs of 4-hydroxybenzoate of Compound 1 and substantially free of amorphous Compound 1 (or any of its amorphous salt forms).
  • Polymorph A is a crystalline solid substantially free of Polymorph B of 4- hydroxybenzoate of Compound 1 and substantially free of amorphous Compound 1 (or any of its amorphous salt forms).
  • a solid sample of Polymorph A may also include other polymorphs (e.g., Polymorph A), and/or amorphous Compound 1 (or any of its amorphous salt forms)
  • a sample of a salt or cocrystal of Compound 1 comprises Polymorph A of 4-hydroxybenzoate of Compound 1 substantially free of other polymorphs (e.g., Polymorph B of 4-hydroxybenzoate of Compound 1).
  • substantially free of other polymorphs means that a sample of crystalline Compound 1 4- hydroxybenzoate contains no significant amount of other polymorphs (e.g., Polymorph B).
  • At least about 90% by weight of a sample is Polymorph A, with only 10% being other polymorphs (e.g., Polymorph B) and/or amorphous Compound 1 (or any of its amorphous salt forms).
  • at least about 95% by weight of a sample is Polymorph A, with only 5% being other polymorphs (e.g., Polymorph B) and/or amorphous Compound 1 (or any of its amorphous salt forms).
  • at least about 98% by weight of a sample is Polymorph A, with only 2% by weight being other polymorphs (e.g., Polymorph B) and/or amorphous Compound 1 (or any of its amorphous salt forms).
  • At least about 99% by weight of a sample is Polymorph A, with only 1% by weight being other polymorphs (e.g., Polymorph B) and/or amorphous Compound 1 (or any of its amorphous salt forms). In still other embodiments, at least about 99.5% by weight of a sample is Polymorph A, with only 0.5% by weight being other polymorphs (e.g., Polymorph B) and/or amorphous Compound 1 (or any of its amorphous salt forms).
  • At least about 99.9% by weight of a sample is Polymorph A, with only 0.1% by weight being other polymorphs (e.g., Polymorph B) and/or amorphous Compound l(or any of its amorphous salt forms).
  • a sample of a salt or cocrystal of Compound 1 may contain impurities.
  • impurities include other polymorph forms, or residual organic and inorganic molecules such as related impurities (e.g., intermediates used to make Compound 1 or by-products, e.g., heptadecan-9-yl 8-bromooctanoate and di(heptadecan-9-yl) 8,8'-((2-hydroxyethyl)azanediyl)dioctanoate), solvents, water or salts.
  • related impurities e.g., intermediates used to make Compound 1 or by-products, e.g., heptadecan-9-yl 8-bromooctanoate and di(heptadecan-9-yl) 8,8'-((2-hydroxyethyl)azanediyl)dioctanoate
  • a sample of a salt or cocrystal of Compound 1, e.g., oxalate or 4-hydroxybenzoate Polymorph A is substantially free from impurities, meaning that no significant amount of impurities are present.
  • a sample of the salt or cocrystal of Compound 1 contains less than 10% weight by weight (wt/wt) total impurities.
  • a sample of the salt or cocrystal of Compound 1 contains less than 5% wt/wt total impurities.
  • a sample of the salt or cocrystal of Compound 1 contains less than 2% wt/wt total impurities.
  • a sample of the salt or cocrystal of Compound 1 contains less than 1% wt/wt total impurities. In yet another embodiment, a sample of the salt or cocrystal of Compound 1 contains less than 0.1% wt/wt total impurities. In yet another embodiment, a sample of the salt or cocrystal of Compound 1 does not contain a detectable amount of impurities.
  • Polymorphs A and B of Compound 1 orotate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four, or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 5.3, 10.7, 13.3, 16.1, and 18.7.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 18, lower profile.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table II below.
  • Polymorph B of Compound 1 orotate can be defined according to its X-ray powder diffraction pattern. Accordingly, in one embodiment, Polymorph B exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four, or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 5.1, 7.5, 10.1, 12.7, 15.2, and 17.8. In one embodiment, Polymorph B exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 18, upper profile. In another embodiment, Polymorph B exhibits an X- ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table III.
  • this disclosure provides Polymorph A of Compound 1 trimesate.
  • Polymorph A of Compound 1 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four, or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 3.3, 5.3, 6.7, 7.9, 10.5, 18.5, 21.3, 23.9, and 26.5.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 32.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table IV below.
  • Polymorph A of Compound 1 trimellitate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four, or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 4.6, 6.8, 9.2, 11.5, 23.1, and 25.4.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 11.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table V below.
  • Polymorph A of Compound 1 sulfate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four, or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 4.0, 11.8, 21.4, 21.8, and 22.8.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu ⁇ radiation, having peaks with 2-theta values substantially in accordance with Figure 30.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table VI below.
  • this disclosure is directed to a salt or cocrystal of heptadecan-9-yl 8- ((2-hydroxyethyl)(6-oxo-6-(undecyloxy)hexyl)amino)octanoate ("Compound 2”) and a compound selected from the group consisting of trimesic acid, (-)-2,3-dibenzoyl-L-tartaric acid, 4-acetamido benzoic acid, (+)-L-tartaric acid, and methanesulfonic acid.
  • this disclosure also provides Polymorph A of Compound 2 trimesate.
  • Polymorph A of Compound 2 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four, or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 3.4, 6.8, 10.2, 20.5, and 23.8.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 38.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table VII below. Table VII
  • this disclosure also provides Polymorph A of Compound 2 dibenzoyl-L-tartrate.
  • Polymorph A of Compound 2 dibenzoyl-L- tartrate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two characteristic peaks expressed in degrees 2-theta (+/- 0.2) at 6.1 and 9.1.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 36, upper profile.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table VTII below.
  • this disclosure also provides Polymorph A of Compound 2 L- tartrate.
  • Polymorph A of Compound 2 L-tartrate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two characteristic peaks expressed in degrees 2-theta (+/- 0.2) at 5.4 and 8.1.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 40, upper profile.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table IX below.
  • this disclosure also provides Polymorph A of Compound 2 mesylate.
  • Polymorph A of Compound 2 mesylate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, or four characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 4.0, 11.4, 11.8, and 19.8.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 42.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table X below.
  • this disclosure is directed to a salt or cocrystal of heptadecan-9-yl 8-((2-hydroxyethyl)(8-(nonyloxy)-8-oxooctyl)amino)octanoate ("Compound 3”) and trimesic acid.
  • this disclosure also provides Polymorph A of Compound 3 trimesate.
  • Polymorph A of Compound 3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four or more characteristic peaks expressed in degrees 2-theta (+/- 0.4) selected from the group consisting of 3.5, 6.8, 10.4, 18.9 and 20.9.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 46. In another embodiment, Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table XT below.
  • this disclosure also provides Polymorph B of Compound 3 trimesate.
  • Polymorph B of Compound 3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, comprising two, three, or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 6.2, 10.8, 16.5, and 26.7.
  • Polymorph B of Compound 3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having characteristic peaks expressed in degrees 2-theta (+/- 0.2) at 6.2, 10.8, 16.5, and 26.7.
  • Polymorph B of Compound 3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having at least five characteristic peaks expressed in degrees 2-theta (+/- 0.2), selected from the group consisting of 6.2, 10.8, 12.4, 16.5, 18.7, 22.5, and 26.7.
  • Polymorph B of Compound 3 trimesate exhibits an X-ray powder diffraction obtained using Cu Ka radiation, pattern having at least six characteristic peaks expressed in degrees 2-theta (+/- 0.2), selected from the group consisting of 6.2, 10.8, 12.4, 16.5, 18.7, 22.5, and 26.7.
  • Polymorph B of Compound 3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four, or more characteristic peaks expressed in degrees 2-theta (+/- 0.4) selected from the group consisting of 6.2, 10.8, 12.4, 16.5, 18.7, 22.5 and 26.7.
  • Polymorph B exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 48.
  • Polymorph B exhibits an X- ray powder diffraction obtained using Cu Ka radiation, pattern having peaks with 2-theta values substantially in accordance with Table XII below.
  • Polymorph B of trimesate of Compound 3 is identifiable on the basis of a characteristic peak observed in a differential scanning calorimetry thermogram.
  • Polymorph B of trimesate of Compound 3 exhibits a differential scanning calorimetry thermogram showing a characteristic melting endotherm peak expressed in units of °C with an onset temperature of about 305 +/- 2 °C.
  • Polymorph A of trimesate of Compound 3 exhibits a differential scanning calorimetry thermogram showing a second primary endotherm expressed in units of °C at a temperature of 240 +/- 2 °C.
  • Polymorph B of trimesate of Compound 3 exhibits a differential scanning calorimetry thermogram substantially in accordance with Figure 49.
  • Polymorph A of trimesate of Compound 3 is substantially free of impurities, meaning there is not a significant amount of impurities present in the sample of Polymorph A.
  • Polymorph A is a crystalline solid substantially free of amorphous Compound 3 (or any of its amorphous salt forms).
  • Polymorph A is a crystalline solid substantially free of other polymorphs of 4-hydroxybenzoate of Compound 3 and substantially free of amorphous Compound 3 (or any of its amorphous salt forms).
  • Polymorph A is a crystalline solid substantially free of Polymorph B of trimesate of Compound 3 and substantially free of amorphous Compound 3 (or any of its amorphous salt forms).
  • a solid sample of Polymorph B may also include other polymorphs (e.g., Polymorph A), and/or amorphous Compound 3 (or any of its amorphous salt forms).
  • a sample of a salt or cocrystal of Compound 3 comprises Polymorph A of trimesate of Compound 3 substantially free of other polymorphs (e.g.,
  • Polymorph B of trimesate of Compound 3 As used herein, the term "substantially free of other polymorphs" means that a sample of crystalline Compound 3 trimesate contains no significant amount of other polymorphs (e.g., Polymorph B). In certain embodiments, at least about 90% by weight of a sample is Polymorph A, with only 10% being other polymorphs (e.g., Polymorph B) and/or amorphous Compound 3 (or any of its amorphous salt forms). In certain embodiments, at least about 95% by weight of a sample is Polymorph A, with only 5% being other polymorphs (e.g., Polymorph B) and/or amorphous Compound 3 (or any of its amorphous salt forms).
  • At least about 98% by weight of a sample is Polymorph A, with only 2% by weight being other polymorphs (e.g., Polymorph B) and/or amorphous Compound 3 (or any of its amorphous salt forms). In still other embodiments, at least about 99% by weight of a sample is Polymorph A, with only 1% by weight being other polymorphs (e.g., Polymorph B) and/or amorphous Compound 3 (or any of its amorphous salt forms).
  • At least about 99.5% by weight of a sample is Polymorph A, with only 0.5% by weight being other polymorphs (e.g., Polymorph B) and/or amorphous Compound 3 (or any of its amorphous salt forms). In still other embodiments, at least about 99.9% by weight of a sample is Polymorph A, with only 0.1% by weight being other polymorphs (e.g., Polymorph B) and/or amorphous Compound 3 (or any of its amorphous salt forms).
  • a sample of a salt or cocrystal of Compound 3 may contain impurities.
  • impurities include other polymorph forms, or residual organic and inorganic molecules such as related impurities (e.g., intermediates used to make Compound 3 or by-products), solvents, water or salts.
  • a sample of a salt or cocrystal of Compound 3, e.g., trimesate Polymorph A is substantially free from impurities, meaning that no significant amount of impurities are present.
  • a sample of the salt or cocrystal of Compound 3 contains less than 10% weight by weight (wt/wt) total impurities.
  • a sample of the salt or cocrystal of Compound 3 contains less than 5% wt/wt total impurities. In another embodiment, a sample of the salt or cocrystal of Compound 3 contains less than 2% wt/wt total impurities. In another embodiment, a sample of the salt or cocrystal of Compound 3 contains less than 1% wt/wt total impurities. In yet another embodiment, a sample of the salt or cocrystal of
  • Compound 3 contains less than 0.1% wt/wt total impurities. In yet another embodiment, a sample of the salt or cocrystal of Compound 3 does not contain a detectable amount of impurities.
  • this disclosure also provides Polymorph A of MC3 trimesate.
  • Polymorph A of MC3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, comprising two, three, or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 5.2, 7.8, 20.9, and 23.6.
  • Polymorph A of MC3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four, or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 5.2, 7.8, 10.4, 20.9, and 23.6.
  • Polymorph A of MC3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having characteristic peaks expressed in degrees 2-theta (+/- 0.2) at 5.2, 7.8, 10.4, 18.3, 20.9, 23.6, and 26.2.
  • Polymorph A of MC3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having at least seven characteristic peaks expressed in degrees 2-theta (+/- 0.2), selected from the group consisting of 5.2, 7.8, 9.7, 10.4,
  • Polymorph A of MC3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having at least nine characteristic peaks expressed in degrees 2-theta (+/- 0.2), selected from the group consisting of 5.2, 7.8, 9.7, 10.4, 11.5, 13.0, 18.3, 20.9, 23.6, and 26.2.
  • Polymorph A of MC3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 5.2, 7.8, 10.4, 18.3, 20.9, 23.6, and 26.2.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 52.
  • Polymorph A exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table XIII below.
  • Polymorph A of trimesate of MC3 is identifiable on the basis of a characteristic peak observed in a differential scanning calorimetry thermogram.
  • Polymorph A of trimesate of MC3 exhibits a differential scanning calorimetry thermogram showing a characteristic melting endotherm peak expressed in units of °C with an onset temperature of about 184 +/- 2 °C.
  • Polymorph A of trimesate of MC3 exhibits a differential scanning calorimetry thermogram substantially in accordance with the lower curve shown in Figure 53.
  • Polymorph A of trimesate of MC3 exhibits a differential scanning calorimetry thermogram showing a characteristic melting endotherm peak expressed in units of °C with an onset temperature of about 186 +/- 2 °C.
  • Polymorph A of trimesate of MC3 exhibits a differential scanning calorimetry thermogram showing a second primary endotherm expressed in units of °C at a temperature of 90 +/- 2 °C.
  • Polymorph A of trimesate of MC3 exhibits a differential scanning calorimetry thermogram substantially in accordance with Figure 54.
  • Polymorph A of trimesate of MC3 wherein the solid form undergoes a weight increase of less than 1.0% (e.g., less than 0.5%, or less than 0.3%) upon increasing relative humidity from 5.0% to 95.0% at e.g., 25 °C.
  • Polymorph A of trimesate of MC3 is characterized as having a dynamic vapor sorption profile that is substantially in accordance with Figure 57.
  • Polymorph A of trimesate of MC3 is substantially free of impurities, meaning there is not a significant amount of impurities present in the sample of Polymorph A.
  • Polymorph A is a crystalline solid substantially free of amorphous MC3 (or any of its amorphous salt forms).
  • Polymorph A is a crystalline solid substantially free of other polymorphs of trimesate of MC3 and substantially free of amorphous MC3 (or any of its amorphous salt forms).
  • Polymorph A is a crystalline solid substantially free of Polymorph B of trimesate of MC3 and substantially free of amorphous MC3 (or any of its amorphous salt forms).
  • a solid sample of Polymorph A may also include other polymorphs (e.g., Polymorph B), and/or amorphous MC3 (or any of its amorphous salt forms).
  • a sample of a salt or cocrystal of MC3 comprises Polymorph A of trimesate of MC3 substantially free of other polymorphs (e.g., Polymorph B of trimesate of MC3).
  • substantially free of other polymorphs means that a sample of crystalline MC3 trimesate contains no significant amount of other polymorphs (e.g., Polymorph B).
  • At least about 90% by weight of a sample is Polymorph A, with only 10% being other polymorphs (e.g., Polymorph B) and/or amorphous MC3 (or any of its amorphous salt forms).
  • at least about 95% by weight of a sample is Polymorph A, with only 5% being other polymorphs (e.g., Polymorph B) and/or amorphous MC3 (or any of its amorphous salt forms).
  • at least about 98% by weight of a sample is Polymorph A, with only 2% by weight being other polymorphs (e.g., Polymorph B) and/or amorphous MC3 (or any of its amorphous salt forms).
  • At least about 99% by weight of a sample is Polymorph A, with only 1% by weight being other polymorphs (e.g., Polymorph B) and/or amorphous MC3 (or any of its amorphous salt forms). In still other embodiments, at least about 99.5% by weight of a sample is Polymorph A, with only 0.5% by weight being other polymorphs (e.g., Polymorph B) and/or amorphous MC3 (or any of its amorphous salt forms).
  • At least about 99.9% by weight of a sample is Polymorph A, with only 0.1% by weight being other polymorphs (e.g., Polymorph B) and/or amorphous MC3 (or any of its amorphous salt forms).
  • a sample of a salt or cocrystal of MC3 may contain impurities.
  • impurities include other polymorph forms, or residual organic and inorganic molecules such as related impurities (e.g., intermediates used to make MC3 or by-products), solvents, water or salts.
  • a sample of a salt or cocrystal of MC3, e.g., trimesate Polymorph A is substantially free from impurities, meaning that no significant amount of impurities are present.
  • a sample of the salt or cocrystal of MC3 contains less than 10% weight by weight (wt/wt) total impurities.
  • a sample of the salt or cocrystal of MC3 contains less than 5% wt/wt total impurities. In another embodiment, a sample of the salt or cocrystal of MC3 contains less than 2% wt/wt total impurities. In another embodiment, a sample of the salt or cocrystal of MC3 contains less than 1% wt/wt total impurities. In yet another embodiment, a sample of the salt or cocrystal of MC3 contains less than 0.1% wt/wt total impurities. In yet another embodiment, a sample of the salt or cocrystal of MC3 does not contain a detectable amount of impurities.
  • this disclosure also provides Polymorph B of MC3 trimesate.
  • Polymorph B of MC3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of (+/- 0.2) at 4.8, 19.4, 24.3, and 26.8.
  • Polymorph B of MC3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having characteristic peaks expressed in degrees 2-theta (+/- 0.2) at 4.8, 5.4, 7.2, 9.7, 19.4, 24.3, 26.8, and 29.3.
  • Polymorph B of MC3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having at least seven characteristic peaks expressed in degrees 2-theta (+/- 0.2), selected from the group consisting of 4.8, 5.4, 7.2, 9.7, 12.1, 19.4, 21.9, 24.3, 26.8, 29.3, and 31.8.
  • Polymorph B of MC3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having at least nine characteristic peaks expressed in degrees 2-theta (+/- 0.2), selected from the group consisting 4.8, 5.4, 7.2, 9.7, 12.1, 14.5, 17.0, 19.4, 21.9, 24.3, 26.8, and 29.3.
  • Polymorph B of MC3 trimesate exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having two, three, four or more characteristic peaks expressed in degrees 2-theta (+/- 0.2) selected from the group consisting of 4.8, 5.4, 7.2, 9.7, 19.4, 24.3, 26.8 , and 29.3.
  • Polymorph B exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Figure 59.
  • Polymorph B exhibits an X-ray powder diffraction pattern obtained using Cu Ka radiation, having peaks with 2-theta values substantially in accordance with Table XIV below.
  • Polymorph B of trimesate of MC3 is identifiable on the basis of a characteristic peak observed in a differential scanning calorimetry thermogram.
  • Polymorph B of trimesate of MC3 exhibits a differential scanning calorimetry thermogram showing a characteristic melting endotherm peak expressed in units of °C with an onset temperature of about 187 +/- 2 °C.
  • Polymorph B of trimesate of MC3 exhibits a differential scanning calorimetry thermogram substantially in accordance with Figure 60.
  • Polymorph B of trimesate of MC3 is substantially free of impurities, meaning there is not a significant amount of impurities present in the sample of Polymorph B.
  • Polymorph B is a crystalline solid substantially free of amorphous MC3 (or any of its amorphous salt forms).
  • Polymorph B is a crystalline solid substantially free of other polymorphs of trimesate of MC3 and substantially free of amorphous trimesate of MC3 (or any of its amorphous salt forms).
  • Polymorph B is a crystalline solid substantially free of Polymorph A of trimesate of MC3 and substantially free of amorphous trimesate of MC3 (or any of its amorphous salt forms).
  • a solid sample of Polymorph B may also include other polymorphs (e.g., Polymorph A), and/or amorphous MC3 (or any of its amorphous salt forms).
  • substantially free of amorphous MC3 means that the compound contains no significant amount of amorphous MC3 (or any of its amorphous salt forms).
  • a sample of a salt or cocrystal of MC3 comprises Polymorph B of trimesate of MC3 substantially free of other polymorphs (e.g., Polymorph A of trimesate of MC3).
  • the term "substantially free of other polymorphs” means that a sample of crystalline MC3 trimesate contains no significant amount of other polymorphs (e.g., Polymorph A).
  • at least about 90% by weight of a sample is Polymorph B, with only 10% being other polymorphs (e.g., Polymorph A) and/or amorphous MC3 (or any of its amorphous salt forms).
  • at least about 95% by weight of a sample is Polymorph B, with only 5% being other polymorphs (e.g., Polymorph A) and/or amorphous MC3 (or any of its amorphous salt forms).
  • At least about 98% by weight of a sample is Polymorph B, with only 2% by weight being other polymorphs (e.g., Polymorph A) and/or amorphous MC3 (or any of its amorphous salt forms). In still other embodiments, at least about 99% by weight of a sample is Polymorph B, with only 1% by weight being other polymorphs (e.g., Polymorph A) and/or amorphous MC3 (or any of its amorphous salt forms).
  • At least about 99.5% by weight of a sample is Polymorph B, with only 0.5% by weight being other polymorphs (e.g., Polymorph A) and/or amorphous MC3 (or any of its amorphous salt forms). In still other embodiments, at least about 99.9% by weight of a sample is Polymorph B, with only 0.1% by weight being other polymorphs (e.g., Polymorph A) and/or amorphous MC3 (or any of its amorphous salt forms).
  • a sample of a salt or cocrystal of MC3 may contain impurities.
  • impurities include other polymorph forms, or residual organic and inorganic molecules such as related impurities (e.g., intermediates used to make MC3 or by-products), solvents, water or salts.
  • a sample of a salt or cocrystal of MC3, e.g., trimesate Polymorph B is substantially free from impurities, meaning that no significant amount of impurities are present.
  • a sample of the salt or cocrystal of MC3 contains less than 10% weight by weight (wt/wt) total impurities.
  • a sample of the salt or cocrystal of MC3 contains less than 5% wt/wt total impurities. In another embodiment, a sample of the salt or cocrystal of MC3 contains less than 2% wt/wt total impurities. In another embodiment, a sample of the salt or cocrystal of MC3 contains less than 1% wt/wt total impurities. In yet another embodiment, a sample of the salt or cocrystal of MC3 contains less than 0.1% wt/wt total impurities.
  • a salt or cocrystal of an alkylated Compound 1 (structure of which is shown below, wherein R is an alkyl having, e.g., 1-20 carbon atoms) and a coformer compound such as those disclosed herein, e.g., 4-hydroxybenzoic acid, oxalic acid, trimellitic acid, orotic acid, trimesic acid, sulfuric acid, (-)-2,3-dibenzoyl-L- tartaric acid, 4-acetamido benzoic acid, (+)-L-tartaric acid, and methanesulfonic acid.
  • the salt or cocrystal of an alkylated Compound 1 has a melting point of about 50 °C or greater (e.g., about 60 °C, 70 °C, or greater
  • the salts or cocrystals disclosed herein may comprise Compound 1 (or Compound 2 or 3) and the coformer compound (e.g., an acid), within a ratio from 1 :0.2 mol/mol to 1 :5 mol/mol or from about 1 :0.5 mol/mol to 1 :2 mol/mol, or from 1 :0.4 mol/mol to 1 : 1.1 mol/mol.
  • the molar ratio is about 1 : 1 mol/mol.
  • the salts or cocrystals disclosed herein may comprise (6Z,9Z,28Z,31Z)-heptatriaconta- 6,9,28,3 l-tetraen-19-yl 4-(dimethylamino)butanoate ("MC3") and the coformer compound (e.g., an acid), within a ratio from 1 :0.5 mol/mol (i.e., 2: 1 mol/mol) to 1 :2 mol/mol.
  • MC3 4-(dimethylamino)butanoate
  • the salts or cocrystals disclosed herein may be anhydrous and/or essentially solvent- free form, or be in hydrate and/or solvate form.
  • 4-hydroxybenzoate of Compound 1 is anhydrous.
  • Compound 1 orotate may be anhydrous or in a hydrate or solvate form.
  • a salt form or cocrystal is prepared by combining in solution the free base compound and a coformer (e.g., an acid coformer) containing the anion of the salt form desired, and then isolating the solid salt or cocrystal product from the reaction solution (e.g., by crystallization, precipitation, evaporation, etc.).
  • a coformer e.g., an acid coformer
  • Other salt-forming or cocrystallization techniques may be employed.
  • a method of preparing a salt or cocrystal of Compound 1 by combining Compound 1 with a compound selected from the group consisting of 4- hydroxybenzoic acid, oxalic acid, trimellitic acid, orotic acid, trimesic acid, and sulfuric acid comprises the steps: a) dissolving Compound 1 in a solvent to obtain a solution; b) combining the coformer compound with the solution; c) precipitating or crystallizing the salt or cocrystal from the solution; and d) collecting the salt or cocrystal.
  • the solvent used in step a) is n-heptane, ethyl acetate, or cyclohexane.
  • step c) is carried out substantively free of evaporation to obtain 4-hydroxybenzoate, trimellitate, orotate, and trimesate of Compound 1.
  • step c) is carried out by slow evaporation, at e.g., 5 °C, to obtain, e.g., sulfate of Compound 1.
  • the molar ratio of Compound 1 and the compound is about 1 : 1.
  • Also provided herein is a method for preparing a salt or cocrystal of Compound 2 by combining Compound 2 with a compound selected from the group consisting of trimesic acid, (-)-2,3-dibenzoyl-L-tartaric acid, 4-acetamido benzoic acid, (+)-L-tartaric acid, and
  • the method comprises the steps: a) dissolving Compound 2 in a solvent to obtain a solution; b) combining the coformer compound with the solution; c) precipitating or crystallizing the salt or cocrystal from the solution; and d) collecting the salt or cocrystal.
  • the solvent used in step a) is n-heptane, ethyl acetate, or cyclohexane.
  • step c) is carried out substantively free of evaporation to obtain trimesate, dibenzoyl-L-tartrate, or 4-acetamido benzoate of Compound 2.
  • step c) is carried out by slow evaporation, at e.g., 5 °C, to obtain, e.g., dibenzoyl-L- tartrate, L-tartrate, or mesylate of Compound 2.
  • the molar ratio of Compound 2 and the compound is about 1 : 1.
  • This disclosure also provides a method of preparing the salt or cocrystal of Compound 3 by combining Compound 3 and trimesic acid.
  • the method comprises the steps: a) dissolving Compound 3 in a solvent to obtain a solution; b) combining trimesic acid with the solution; c) precipitating or crystallizing the salt or cocrystal from the solution; and d) collecting the salt or cocrystal.
  • the solvent used in step a) is n-heptane or toluene.
  • step c) is carried out substantively free of evaporation.
  • step c) is carried out by slow evaporation.
  • the molar ratio of Compound 3 and the compound is about 1 : 1.
  • This disclosure also provides a method of preparing the salt or cocrystal of MC3 by combining MC3 and a compound selected from (+)-0,0-di-pivaloyl-D-tartaric acid (DPDT), (-)-
  • the method comprises the steps: a) dissolving MC3 in a solvent to obtain a solution; b) combining the compound with the solution; c) precipitating or crystallizing the salt or cocrystal from the solution; and d) collecting the salt or cocrystal.
  • the solvent used in step a) is ethyl acetate, toluene, or cyclohexane.
  • step c) is carried out substantively free of evaporation.
  • step c) is carried out by slow evaporation.
  • the molar ratio of MC3 and the compound is about 1 : 1.
  • This disclosure also provides a method of preparing the salt or cocrystal of MC3 by combining MC3 and a compound selected from (+)-0,0-di-pivaloyl-D-tartaric acid (DPDT), (-)- 0,0-di-pivaloyl-L-tartaric acid (DPLT), (+)-2,3-dibenzoyl-D-tartaric acid (DBDT), and trimesic acid.
  • DPDT (+)-0,0-di-pivaloyl-D-tartaric acid
  • DPLT (-)- 0,0-di-pivaloyl-L-tartaric acid
  • DBDT (+)-2,3-dibenzoyl-D-tartaric acid
  • trimesic acid trimesic acid
  • the method comprises the steps: a) combining MC3 and trimesic acid; b) dissolving the combination of MC3 and the compound to obtain a solution; c) precipitating or crystallizing the salt or cocrystal from the solution; and d) collecting the salt or cocrystal.
  • the solvent used in step a) is ethyl acetate, toluene, or cyclohexane.
  • step c) is carried out substantively free of evaporation.
  • step c) is carried out by slow evaporation.
  • the molar ratio of MC3 and the compound is about 1 : 1.
  • the solvent comprises an aprotic solvent. In one embodiment of the method, the solvent comprises a nonpolar aprotic solvent. In certain embodiments, one or more of the solutions of steps a) or b) is heated. For example, the solution from step b) is subject to temperature cycling, e.g., from about 50 °C to about 5 °C (for e.g., twice, three, or four times) before step c).
  • Also provided herein is a process of purifying Compound 1, 2, or 3 by forming a salt or cocrystal thereof disclosed herein to separate the salt or cocrystal thereof from the impurities.
  • the method may further comprise neutralizing the salt or cocrystal to convert to Compound 1, 2, or 3 (i.e., a free base).
  • Also provided herein is a process of purifying MC3 by forming a salt or cocrystal thereof disclosed herein to separate the salt or cocrystal thereof from the impurities.
  • the method may further comprise neutralizing the salt or cocrystal to convert to MC3 (i.e., a free base).
  • a suitable electrophile such as an ester substituted with a halogen (e.g., Br or I).
  • Compound 1 is oil and it is hard to purify it, e.g., by separating it from a and b, and other by-products.
  • Compound 1 oxalate is a crystal, thus is easy to separate from a, b, and/or other by-products.
  • Forming a salt or cocrystal of Compound 1 e.g., oxalate, improves purification.
  • Compound 1 oxalate can be used to synthesize Compound 2 or 3 without converting back to Compound 1 (i.e., neutralization).
  • MC3 corresponds to compound 16 in this article.
  • the process of the present disclosure is advantageous as compared to other processes in that the process of the disclosure produces Compound 1, 2, or 3 or a salt or cocrystal thereof at a large scale and/or at a high purity, e.g., such that cumbersome purification (e.g., column chromatography, extraction, phase separation, distillation and solvent evaporation) is not needed.
  • cumbersome purification e.g., column chromatography, extraction, phase separation, distillation and solvent evaporation
  • the process of the present disclosure is able to process at least 100 g, 200 g, 500 g or more (e.g., 1 kg, 2 kg, 5 kg, 10 kg, 20 kg, 50 kg, 100 kg, 200 kg, 500 kg, or 1000 kg or more) Compound 1, 2, or 3 or a salt or cocrystal thereof without the need to scale up.
  • the process of the present disclosure is able to produce Compound 1, 2, or 3 or a salt or cocrystal thereof at least at a purity of at least 75%, 80%, 85%, 90%, 95%, 96%, 97%, 98%, 99%, or 99.5%, or higher.
  • the process of the present disclosure is able to produce Compound 1, 2, or 3 or a salt or cocrystal thereof with little or none impurity.
  • the impurity produced in the process of the present disclosure even if produced, is easy to be separated from Compound 1, 2, or 3 or a salt or cocrystal thereof, without cumbersome purification (e.g., column chromatography, extraction, phase separation, distillation and solvent evaporation).
  • TGA data were collected using a TA Q500/Q5000 TGA from TA Instruments.
  • DSC was performed using a TA Q200/Q2000 DSC from TA Instruments. Detailed parameters used are listed in the following table.
  • Temperature RT - desired temperature or -60 °C- desired temperature; or
  • DVS was measured on via a SMS (Surface Measurement Systems) DVS Intrinsic. The relative humidity at 25 °C were calibrated against deliquescence point of LiCl, Mg(NC )2 and KC1. Actual parameters for DVS test are listed in the table below.
  • Compound 1 freebase is an oil at ambient conditions. As per the results in Figures 34 and 35, the freebase showed minor weight loss of 1.1% before 200 °C in TGA, and possible crystallization and melting signals in cyclic DSC, suggesting the existence of a crystalline form which melts around 17 °C (peak). Purity of the material was determined to be 99.95 area% by HPLC with ELSD detector.
  • Isolated crystal solids were characterized by X-ray powder diffraction (XRPD), thermo- gravimetric analysis (TGA) and differential scanning calorimetry (DSC), with proton nuclear magnetic resonance (3 ⁇ 4 NMR) to confirm the freebase chemical structure and also potential coexistence with some organic acids.
  • XRPD X-ray powder diffraction
  • TGA thermo- gravimetric analysis
  • DSC differential scanning calorimetry
  • 3 ⁇ 4 NMR proton nuclear magnetic resonance
  • DSC endo therm, S6.8, 101.8 (batch 1) 78.3, 137.1 (batch 1) 78.8*, 85.1*, 176.3* 83.5* °C (onset) 68.2, 103.5 (batch 2) 80.0*, 137.1 (batch 2)
  • Hygroscopicity Non-hygroscopic Slightly hygroscopic ⁇ Hygroscopic (form change after (no) (no) (convert to orotate DVS) Polymorph A)
  • sample (batch No. 2) showed a weight loss of 0.7% up to 140 °C and two sharp endothermic peaks at 68.2 °C and 103.5 °C (onset temperature) before decomposition.
  • 4- hydroxybenzoate Polymorph A was considered to be an anhydrous form.
  • the two sharp endothermic signals in DSC curve implied the possible existence of another anhydrous form at higher temperature.
  • Trimellitate Polymorph A samples (batch Nos. 1 and 2) were prepared by reactive crystallization in EtO Ac with XRPD patterns shown in Figure 11. The 3 ⁇ 4 NMR spectrum was collected for sample (batch No. 2) and is shown in Figure 12. Compared to freebase, a certain amount of trimellitic acid was detected (signals between 8.0 and 9.0 ppm), indicating the salt formation.
  • sample (batch No. 1) showed a weight loss of 3.4% up to 110 °C and two endothermic peaks at 78.3 °C and 137.1 °C (onset temperature) before decomposition.
  • VT-XRPD results in Figure 14 extra diffraction peaks appeared after 20 minutes of N2 flow, and new form was observed at 90 °C, which converted back to trimellitate Polymorph A after being heated and exposed to ambient condition, suggesting that Polymorph A is a hydrated form.
  • Orotate Polymorph A and Polymorph B were generated via reactive crystallization in EtOAc with XRPD patterns shown in Figure 18.
  • the 3 ⁇ 4 NMR spectrum of Polymorph A was collected and is shown in Figure 19.
  • freebase a certain amount of orotic acid was detected (signal at 5.7 ppm).
  • TGA and DSC data of Polymorph B in Figure 23 showed a weight loss of 4.0% up to 110 °C and endothermic peak at 78.1 °C (onset) before decomposition.
  • Polymorph B converted to Polymorph A with data illustrated in Figure 24 and Figure 25, indicating Polymorph B is a hydrated or solvate form.
  • DVS test of Polymorph B sample showed that it is slightly hygroscopic and converted to Polymorph A after DVS test, with data displayed in Figure 26 and Figure 27.
  • Polymorph B sample showed irregular particles in PLM image ( Figure 28) and a purity of 99.97 area% detected by HPLC (Table 5).
  • Trimesate Polymorph A was generated from reactive crystallization in EtOAc system and XRPD pattern is shown in Figure 32. 3 ⁇ 4 NMR results in Figure 33 showed obvious signal of trimesic acid besides chemical shifts of freebase.
  • Compound 2 freebase showed minor weight loss of 1.6% before reaching 200 °C in TGA. No obvious glass transition signal was observed and multiple endothermic peaks were observed with temperature elevated from -60 to 35 °C. Two endothermic signals at -47.7 and -34.0 °C (onset) were observed during temperature elevated from -60 to 35 °C.
  • Isolated crystal solids were characterized by X-ray powder diffraction (XRPD), thermo- gravimetric analysis (TGA) and differential scanning calorimetry (DSC), with proton nuclear magnetic resonance (3 ⁇ 4 NMR) to confirm the freebase chemical structure and also potential coexistence with some organic acids.
  • XRPD X-ray powder diffraction
  • TGA thermo- gravimetric analysis
  • DSC differential scanning calorimetry
  • 3 ⁇ 4 NMR proton nuclear magnetic resonance
  • Trimesic acid Trimesate Polymorph A Trimesate Polymorph A Gel
  • Compound 2 dibenzoyl-L-tartrate Polymorph A was prepared by combining Compound 2 freebase with (-)-2,3-dibenzoyl-L-tartaric acid in n-heptane and showed crystallinity as characterized by XRPD in Figure 36.
  • the TGA/DSC data as shown in Figure 37 indicate a weight loss of 30.5% up to 100 °C and broad endothermic signals before decomposition.
  • Compound 2 trimesate Polymorph A was prepared by combining Compound 2 freebase with trimesic acid in n-heptane and showed crystallinity as characterized by XRPD in Figure 38.
  • the TGA/DSC data as shown in Figure 39 indicate a weight loss of 0.8% up to 150 °C and multiple endothermic signals before decomposition.
  • Compound 2 L-tartrate Polymorph A was prepared by combining Compound 2 freebase with L-tartaric acid in n-heptane and showed crystallinity as characterized by XRPD in Figure 40.
  • the TGA/DSC data as shown in Figure 41 indicate a weight loss of 4.0% up to 100 °C and multiple endothermic signals before decomposition.
  • Compound 2 mesylate Polymorph A was prepared by combining Compound 2 freebase with methanesulfonic acid in n-heptane and showed crystallinity as characterized by XRPD in Figure 42.
  • the TGA/DSC data as shown in Figure 43 indicate a weight loss of 5.9% up to 100 °C and irregular signals in the DSC curve.
  • Compound 2 4-acetamido benzoate Polymorph A was prepared by combining Compound 2 freebase with 4-acetamido benzoic acid in n-heptane and showed crystallinity as characterized by XRPD in Figure 44.
  • the TGA/DSC data as shown in Figure 45 indicate a weight loss of 0.02% up to 150 °C and multiple endothermic signals before decomposition.
  • Compound 3 freebase as characterized via modulated DSC (mDSC), exhibits no glass transition signal. A weight loss of 1.2% was observed up to 200 °C, and endotherms were observed at -44.1 °C and -29.9 °C (peak).
  • Isolated crystal solids were characterized by X-ray powder diffraction (XRPD), thermo- gravimetric analysis (TGA) and differential scanning calorimetry (DSC), with proton nuclear magnetic resonance ( H NMR) to confirm the freebase chemical structure and also potential coexistence with some organic acids.
  • XRPD X-ray powder diffraction
  • TGA thermo- gravimetric analysis
  • DSC differential scanning calorimetry
  • H NMR proton nuclear magnetic resonance
  • Compound 3 trimesate Polymorph A was prepared by combining Compound 3 freebase with trimesic acid in n-heptane and showed crystallinity as characterized by XRPD in Figure 46.
  • the TGA/DSC data as shown in Figure 47 indicate a weight loss of 0.9% up to 200 °C and three endothermic peaks at 49.4 °C, 100.2 °C and 129.2 °C (peak temperature) before decomposition.
  • Polymorph B was obtained via temperature cycling in EtOH/n-heptane (1 : 19, v/v) from 50 °C to 5 °C with molar charge ratio (compound 3: trimesic acid) at 1 : 1, and showed crystallinity as characterized by XRPD in Figure 48.
  • the TGA/DSC data as shown in Figure 49 indicate a weight loss of 5.4% up to 200 °C and two endothermic peaks at 239.9 °C and 257.5 °C before decomposition at 304.6 °C.
  • An 3 ⁇ 4 NMR spectrum was collected using (CD3) 2 SO as the test solvent, and signals of trimesic acid and compound 3 were observed. See Figure 50.
  • Example 4 Salts or Co-crystals of MC3
  • Crystalline salt hits were obtained with (+)-0,0-di-pivaloyl-D-tartaric acid (DPDT), (-)-0,0-di- pivaloyl-L-tartaric acid (DPLT), and trimesic acid.
  • a solvent screening was performed by reaction of free base and DPDT, DPLT and trimesic acid in 17 selected solvents to improve crystallinity and facilitate salt isolation and re- preparation.
  • the X-ray powder diffraction (XRPD) results showed that crystalline trimesate Type A and B were obtained in ketones, esters and some other selected solvents from slurry at room temperature.
  • XRPD X-ray powder diffraction
  • trimesate Type A is anhydrous and non-hygroscopic.
  • N/A not applicable or data not collected in this study.
  • a solvent screening was performed to select an optimal solvent system for re- preparation of the salt hits and to improve crystallinity.
  • the free base was mixed in a 1 : 1 molar ratio, with DPDT, DPLT, and trimesic acid in 17 selected solvents.
  • Trimesate Type A and B polymorphs were isolated from slurries in several solvents (see Table 12).
  • DPDT and DPLT salts were not obtained as solids from any solvent.
  • the samples containing tetrahydrofuran (THF)/H20, THF, cyclohexane and 1,4-dioxane were freeze-dried, but no crystalline solid was obtained.
  • Trimesate Type A polymorph was successfully re-prepared in cyclohexane and EtOAc following the procedure detailed below.
  • a 5 mL vial was charged with 100.0 mg of the free base (97.6 area%) and 30 mg of trimesic acid and 2 mL of cyclohexane or EtOAc, were added.
  • the suspension was stirred at room temperature for about 0.5 h.
  • the solution was continued to be stirred while being heated and cooled between 5 °C and 50 °C for two cycles with a 4.5 °C/min heating rate and a 0.1 °C/min cooling rate.
  • the resulting solid was isolated by centrifugation and dried under vacuum at room temperature for 2 hours before characterization.
  • the XRPD pattern of polymorph A is shown in Figure 52.
  • trimesate Type B polymorph The XRPD pattern of trimesate Type B polymorph is shown in Figure 59. TGA/DSC curves displayed in Figure 60 show a weight loss of 8.0% before 150 °C and a sharp melting endotherm at 186.8 °C (onset temperature). As shown in Figure 61, agglomerate particles with small size ( ⁇ 20 ⁇ ) are observed in trimesate Type B sample.
  • the trimesate Type A polymorph is non-hygroscopic. See Figure 57.
  • the hygroscopicity of free base (crude and pure) was determined as well.
  • the crude free base was slightly hygroscopic (0.27 and 0.24 % water uptake at 80% relative humidity for the desorption and adsorption isotherms, respectively), but the pure free base was non- hygroscopic (0.17 and 0.14 % water uptake at 80% relative humidity for the desorption and adsorption isotherms, respectively).
  • Trimesate Type A samples were prepared according to the procedure described in the foregoing, using the crude free base (HPLC purity of 88.5 area%) or purified free base (HPLC purity of 97.6 area%) as starting material, and analyzed by HPLC.
  • the results of the HPLC purity analysis for the samples prepared with crude and purified free base are summarized in Tables 13 and 14, respectively. No significant HPLC purity change was observed for both samples after the DVS experiment.

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