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• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
  • C07D471/12—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains three hetero rings
  • C07D471/16—Peri-condensed systems
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
  • A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
  • A61K31/519—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim ortho- or peri-condensed with heterocyclic rings
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P25/00—Drugs for disorders of the nervous system
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P25/00—Drugs for disorders of the nervous system
  • A61P25/18—Antipsychotics, i.e. neuroleptics; Drugs for mania or schizophrenia
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
  • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
  • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
  • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
  • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
  • C07D213/81—Amides; Imides
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
  • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
  • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
  • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
  • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
  • C07D213/81—Amides; Imides
  • C07D213/82—Amides; Imides in position 3
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/0012—Galenical forms characterised by the site of application
  • A61K9/0019—Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/0012—Galenical forms characterised by the site of application
  • A61K9/0019—Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
  • A61K9/0024—Solid, semi-solid or solidifying implants, which are implanted or injected in body tissue
• • 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 certain novel co-crystal forms of a substituted heterocycle fused gamma-carboline together with nicotinamide or isonicotinamide, the manufacture of such co- crystals, pharmaceutical compositions thereof, and use thereof, e.g., in the treatment of diseases or abnormal conditions involving or mediated by the 5-HT 2 A receptor, serotonin transporter (SERT), and/or dopamine Di/D 2 receptor signaling pathways.
• SERT serotonin transporter
• DA dopamine
• SERT serotonin transporter
• ⁇ -007 is currently in clinical trials, i.a., for treatment of schizophrenia. While ITI-007 is a promising drug, its production and formulation present challenges.
• ITI-007 In free base form, ITI-007 is an oily, sticky solid, with poor solubility, not only in water but also in many organic solvents. Making salts of the compound has proven to be unusually difficult.
• a hydrochloride salt form of ITI-007 was disclosed in US 7183282, but this salt is hygroscopic and shows poor stability.
• a toluenesulfonic acid addition salt (tosylate) of ITI- 007 was finally identified and described in WO 2009/114181.
• the disclosure thus provides novel co-crystal forms of ITI-007 and nicotinamide and of ITI-007 and isonicotinamide, which co-crystals are especially advantageous for use in the preparation of galenic formulations, together with methods of making and using the same.
• Figure 1 depicts an X-ray powder diffraction pattern for an ITI-007 free base isonicotinamide co-crystal.
• Figure 2 depicts an X-ray powder diffraction pattern for an ITI-007 free base nicotinamide co- crystal.
• Figure 3 depicts X-ray powder diffraction patterns for ITI-007 free base nicotinamide co- crystals and nicotinamide reference.
• Figure 4A and 4B depict over-layed X-ray powder diffraction patterns for scale-up batches of ITI-007 free base isonicotinamide co-crystals.
• Figure 5 depicts over-layed X-ray powder diffraction patterns for solids from solubility determination study.
• Pattern (1) is the third batch co-crystal;
• pattern (2) is isonicotinamide reference;
• Patterns (3) to (10) are the solids obtained from solubility studies: (3) dichloromethane, (4) methyl t-butyl ether; (5) acetone; (6) ethyl acetate; (7) ethanol; (8) acetonitrile; (9) toluene; (10) acetic acid (degradation).
• the invention provides l-(4-fluoro-phenyl)-4-((6bR,10aS)-3- methyl-2,3,6b,9,10,10a-hexahydro-lH,7H-pyrido[3 ',4':4,5]pyrrolo[l,2,3-de]quinoxalin-8-yl)- butan-l-one (ITI-007) free base in the form of a co-crystal (Co-crystal 1).
• the invention therefore provides the following:
• Co-crystal 1 wherein the co-crystal is between ITI-007 and a second compound selected from nicotinamide and isonicotinamide.
• Co-crystal 1.2 in a homogeneous crystal form, free or substantially free of other forms, e.g., free or substantially free, e.g., less than 10 wt. %, preferably less than about 5 wt. %, more preferably less than about 2 wt. %, still preferably less than about 1 wt. %, still preferably less than about 0.1 %, most preferably less than about 0.01 wt. % of amorphous forms.
• Co-crystal when crystallized from a mixture of ITI-007 in free base form and a second compound selected from nicotinamide and isonicotinamide, e.g. in an organic solvent, e.g., comprising methanol or ethanol, which solvent is removed to provide the co-crystal; e.g., wherein the ITI-007 and the second compound are in a molar ratio of about 1: 1, and the solvent is methanol or ethanol.
• an organic solvent e.g., comprising methanol or ethanol
• Co-crystal 1.4 wherein the second compound is nicotinamide, and the Co-crystal is crystallized from methanol.
• Co-crystal 1.4 wherein the second compound is nicotinamide, and the Co-crystal is crystallized from ethanol.
• Co-crystal 1.4 wherein the second compound is isonicotinamide, and the Co-crystal is crystallized from methanol.
• any foregoing Co-crystal which is an ITI-007 free base-isonicotinamide co-crystal having an X-ray powder diffraction pattern corresponding to the d-spacing and/or angle (2-theta) values of the following table, for example at least five, or at least six, or at least seven, or at least eight of said values, e.g., taking into account potential variations due to sample purity and instrument variation, for example 2 ⁇ shifts due to variation in X-ray wavelength, e.g., wherein the X-ray powder diffraction pattern is generated using an X- ray diffractometer with a copper anode and a nickel filter, e.g., comprising at least those peaks having a relative intensity of at least 0.1, e.g., comprising at least peaks 5 and 6:
• Co-crystal which is an ITI-007 free base-isonicotinamide co-crystal having an X-ray powder diffraction pattern corresponding to Figure 1 or Figure 4, e.g., taking into account potential variations due to sample purity and instrument variation, for example 2 # shifts due to variation in X-ray wavelength, e.g., an X-ray powder diffraction pattern having the peak list shown in Table 1, Table 3 or Table 4, generated using an X- ray diffractometer with a copper anode and a nickel filter.
• any foregoing Co-crystal which is an ITI-007 free base-isonicotinamide co-crystal having an X-ray powder diffraction pattern having at least 5, or at least 6, or at least 7, or at least 8, peaks having angle (2-theta) values selected from the group consisting of about 7.89, 11.51, 15.68, 20.83, 23.09, 23.55, 25.62, 31.56, 34.92, and 36.73, taking into account potential variations due to sample purity and instrument variation, wherein the X-ray powder diffraction pattern is generated using an X-ray diffractometer with a copper anode and a nickel filter.
• any foregoing Co-crystal which is an ITI-007 free base-isonicotinamide co-crystal having an X-ray powder diffraction pattern having at least 5, or at least 6, or at least 7, or at least 8, peaks having d-spacing values selected from the group consisting of about 11.19, 7.68, 5.65, 4.26, 3.85, 3.78, 3.48, 2.83, 2.57, and 2.45, taking into account potential variations due to sample purity and instrument variation, wherein the X-ray powder diffraction pattern is generated using an X-ray diffractometer with a copper anode and a nickel filter.
• Co-crystal which is an ITI-007 free base-isonicotinamide co-crystal having an X-ray powder diffraction pattern having at least 5, or at least 6, or at least 7, or at least 8, peaks having angle (2-theta) values and/or d-spacing values as provided in 1.12 and 1.13.
• Co-crystal which is an ITI-007 free base-isonicotinamide co-crystal having an X-ray powder diffraction powder having relative angle (2-theta) values as provided in the table of embodiment 1.10, wherein the values are shifted by up to +/- 0.2 degrees, e.g., wherein the values are substantially uniformly shifted by up to +/- 0.2 degrees.
• Co-crystal which is an ⁇ -007 free base-nicotinamide co-crystal having an X-ray powder diffraction pattern corresponding to the upper pattern in Figure 2, e.g., taking into account potential variations due to sample purity and instrument variation, for example 29 shifts due to variation in X-ray wavelength, e.g., an X-ray powder diffraction pattern corresponding to the upper pattern in Figure 2 generated using an X-ray diffractometer with a copper anode and a nickel filter.
• any foregoing Co-crystal wherein the ITI-007 is deuterated e.g., wherein the deuterium:protium ratio at one or more specified positions in the molecule is significantly higher, e.g., at least 2x, for example at least lOx higher, than the natural isotope ratios or the isotope ratios at other positions in the molecule at ; for example, any foregoing form of Co-crystal 1 wherein the -CH2- adjacent to the methylated nitrogen moiety and/or adjacent to the carbonyl moiety of ITI-007 is deuterated, e.g., is in the form of -CHD- or -CD2- at levels which are significantly higher than the natural deuterium:protium isotope ratio or the deuterium:protium isotope ratio at other positions in the molecule, and/or wherein the methyl group is deuterated, e.g., is CD3-, e.g., at levels which
• the invention provides a process (Process 1) for the production of
• Co-crystal 1 comprising
• Co-crystal according to any of Co-crystal 1 - 1.20 above.
• the invention provides a method of purifying l-(4-fluoro-phenyl)- 4-((6bR,10aS)-3-methyl-2,3,6b,9,10,10a-hexahydro-lH,7H-pyrido[3',4':4,5]pyrrolo[l,2,3- de]quinoxalin-8-yl)-butan-l-one (ITI-007) in free or salt form, comprising combining crude ITI- 007 with a second compound selected from nicotinamide and isonicotinamide, in the presence of a solvent, e.g, comprising methanol, removing the solvent and recovering the Co-crystal thus formed, e.g., in accordance with Process 1, and optionally converting the Co-crystal back to ITI- 007 free base or to a desired salt form.
• a solvent e.g, comprising methanol
• the invention provides the use of a compound selected from nicotinamide and isonicotinamide in a method of isolating and/or purifying ITI-007.
• the invention provides a pharmaceutical composition
• a pharmaceutical composition comprising Co-crystal 1, e.g., any of Co-crystal 1.1-1.20, as active ingredient, in combination or association with a pharmaceutically acceptable diluent or carrier.
• the invention provides a pharmaceutical composition
• a pharmaceutical composition comprising Co-crystal 1, e.g., any of Co-crystal 1.1-1.20, as active ingredient, in combination or association with a pharmaceutically acceptable diluent or carrier, wherein the Co-crystal 1 is predominantly, or is entirely or substantially entirely, in dry crystalline form.
• Co-crystal 1, e.g., any of Co-crystal 1.1-1.20 are found to be relatively insoluble. While the free base is poorly soluble, it does not form crystals and is difficult to formulate. Salt forms are quite soluble, but may provide undesirably fast dissolution in extended release formulations.
• the invention provides a pharmaceutical composition for extended release of ITI-007, comprising Co-crystal 1, e.g., any of Co-crystal 1.1-1.20, as active ingredient, in combination or association with a pharmaceutically acceptable diluent or carrier, e.g., wherein the pharmaceutical composition is in the form of an injectable depot for extended release.
• the invention provides Co-crystal 1, e.g., any of Co-crystal 1.1- 1.20, or a pharmaceutical composition comprising Co-crystal 1, e.g., any of Co-crystal 1.1-1.20, for use in treating a disease or abnormal condition involving or mediated by the 5-HT 2 A receptor, serotonin transporter (SERT), and/or dopamine Di/D 2 receptor signaling pathways, e.g., a disorder selected from obesity, anorexia, bulemia, depression, anxiety, psychosis, schizophrenia, migraine, obsessive-compulsive disorder, sexual disorders, depression, schizophrenia, migraine, attention deficit disorder, attention deficit hyperactivity disorder, obsessive-compulsive disorder, sleep disorders, conditions associated with cephalic pain, social phobias, or dementia.
• the invention provides a method for the prophylaxis or treatment of a human suffering from a disease or abnormal condition involving or mediated by the 5-HT 2 A receptor, serotonin transporter (SERT), and/or dopamine Di/D 2 receptor signaling pathways, e.g., a disorder selected from obesity, anorexia, bulemia, depression, anxiety, psychosis, schizophrenia, migraine, obsessive-compulsive disorder, sexual disorders, depression, schizophrenia, migraine, attention deficit disorder, attention deficit hyperactivity disorder, obsessive-compulsive disorder, sleep disorders, conditions associated with cephalic pain, social phobias, or dementia, comprising administering to a patient in need thereof a therapeutically effective amount of any of Co-crystal 1 - 1.20.
• the standard sample holder (0.1 mm cavity in (510) silicon wafer) has a minimal contribution to the background signal. Measurement conditions: scan range 5 - 45° 2 ⁇ , sample rotation 5 rpm, 0.5s/step, 0.010°/step, 3.0mm detector slit; and all measuring conditions are logged in the instrument control file. As system suitability, corundum sample A26- B26-S (NIST standard) is measured daily.
• the software used for data collection is Diffrac. Commander v2.0.26. Data analysis is done using Diffrac.Eva vl.4. No background correction or smoothing is applied to the patterns.
• TGA thermogravimetry
• DSC differential scanning calorimetry
• TGA/DSC studies are performed using a Mettler Toledo TGA/DSC 1 Stare System, equipment #1547, auto-sampler equipped, using pin-holed Al- crucibles of 40 ⁇ . Measurement conditions: 5 min 30.0 °C, 30.0 - 350.0 °C with 10 °C/min., N2 flow of 40 ml/min.
• the software used for instrument control and data analysis is STARe vl2.10.
• DSC Differential scanning calorimetry
• PLM Polarized light microscopy
• Dynamic Vapour Sorption The Dynamic Vapour Sorption studies are performed using a Surface Measurement Systems Ltd. DVS-1 No Video, equipment #2126. The sample is loaded into a balance pan, typically 20-30 mg, and equilibrated at 0% RH. After the material was dried, the RH is increased with 10% per step for 1 hour per increment, ending at 95% RH. After completion of the sorption cycle, the sample was dried using the same method.
• the software used for data collection is DVSWin v3.01 No Video. Data analysis is performed using DVS Standard Analysis Suite v6.3.0 (Standard).
• Capillary Melting Point The capillary melting point is determined on a Biichi Melting Point B-545, equipment #000011, conform USP guidelines.
• X-ray fluorescence (XRF): The X-ray fluorescence studies are performed using a Bruker AXS S2 RANGER, equipment #2006. Using an end-window X-ray tube with Palladium anode and an ultra-thin Beryllium window (75 ⁇ ) for superior light element analysis. As detector the Xflash V5 detector with Cr, Ti, Al, Ta collimator (energy resolution ⁇ 129 eV FWHM at 100 000 cps Mnka) is used. The S2 Ranger is equipped with an autosampler with integrated 28 position X- Y automatic sample changer with exchangeable tray, which allows maximum sample diameter of 40 mm. Samples are mounted in steel rings of 51.5 mm diameter for automatic operation.
• Measurement conditions disposable liquid cups (35 mm inner diameter, 40 mm outer diameter) with polypropylene foil 5 ⁇ . As system suitability check a copper disk is measured daily and a glass disk, containing several elements, is measured weekly.
• the software used for data collection is S2 Ranger Control Software V4.1.0. Data analysis is performed using SPECTRA EDX V2.4.3 evaluation software. No background correction or smoothing is applied to the patterns.
• FT-IR Fourier transform infrared spectroscopy
• the off-gassing materials are directed through a transfer line to a gas cell, where the infrared light interacts with the gases.
• the temperature ramp and first derivative weight loss information from the TGA is shown as a Gram-Schmidt (GS) profile; the GS profile essentially shows the total change in the IR signal relative to the initial state. In most cases, the GS and the derivative weight loss will be similar in shape, although the intensity of the two can differ. For this experiment are two devices coupled to each other.
• the TGA studies are performed using a Mettler Toledo TGA/DSCl STARe System with a 34-position auto sampler, equipment #1547. The samples are made using Al crucibles (100 ⁇ ; pierced).
• High performance liquid chromatography HPLC: The high performance liquid chromatography analyses are performed on LC-31, equipped with an Agilent 1100 series G1322A degasser equipment #1894, an Agilent 1100 series G1311A quaternary pump equipment #1895, an Agilent 1100 series G1313A ALS equipment #1896, an Agilent 1100 series G1318A column equipment #1897 and an Agilent 1100 series G1314A VWD equipment #1898 / LC-34, equipped with an Agilent 1200 series G1379B degasser equipment #2254, an Agilent 1100 series G1311A quaternary pump equipment #2255, Agilent 1100 series G1367A WPALS equipment #1656, an Agilent 1100 series G1316A column equipment #2257 and an Agilent 1100 series G1315B DAD equipment #2258.
• HPLC High performance liquid chromatography
• Solubility of free base in various solvents is evaluated, and based on the results of the solubility range, suitable solvents are selected for the co-crystal screen.
• Co-crystal formation is based on hydrogen bonding and stacking of the molecules, meaning the co-former selection is based on active groups. Grinding is a method to form co-crystals, however the free base itself is an oil/ sticky solid and therefore not suitable for this method.
• the free base and counter ion are added to a solution in a certain ratio to give the chance to form a co-crystal, similar to salt formation. We found the best method is to add a saturated solution of the co-former to that of the free base to find an optimal ratio for co-crystal formation.
• Isonicotinamide forms a possible co-crystal with ITI-007 free base by slurrying the mixture in methanol and ethyl acetate, appearing as a red/brown and yellow solid respectively.
• TGA-DSC analysis of the experiment using isonicotinamide in methanol results in two endothermic events, Both endothermic events do not correspond to the free base or the co-former, which means ITI-007 free base-isonicotinamide co-crystal is formed.
• HPLC and ⁇ - ⁇ analyses confirm both of the free base and the co-former to be present. Using isonicotinamide in ethyl acetate, however, does not result in a co-crystal and, no endothermic event is present in the TGA/DSC analysis.
• TGA-DSC analysis of the other slurry experiments using nicotinamide does not show any melting events, meaning the experiments conducted in acetonitrile or ethyl acetate do not form a co-crystal.
• This experiment is repeated at a gram scale.
• ITI-007 free base and nicotinamide are each dissolved in methanol.
• the obtained solutions were added in a 1: 1 ratio to a vial.
• the mixture is stirred at room temperature for 2 hours, but no precipitation is observed.
• the solution is evaporated under vacuum to give a brown sticky solid. XRPD analysis of this brown sticky solid shows this to be nicotinamide itself.
• ITI-007 free base and 8.6 mg of nicotinamide co-former are combined in 200 of solvent and heated to 50 °C. The mixtures are kept at 50 °C for one hour, then cooled to 5 °C at a rate of 5°C per hour.
• the results show that when methanol, ethanol, isopropanol or 2-butanol is used, the ITI-007 free base and nicotinamide both dissolve to yield a solution which remains a solution on cooling.
• the solids obtained from isopropanol and 2-butanol evaporation are analyzed by XRPD and show peaks corresponding to nicotinamide.
• the solids obtained from methanol and ethanol evaporation are analyzed by XPRD and are shown to be consistent with the formation of a co-crystal.
• XRPD Spectra are shown in Figure 3 as CC1 (cooling), obtained from methanol, and CC2 (cooling), obtained from ethanol. Nicotinamide reference crystal is shown for comparison.

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