Patent ID: 11884626
Assignee: ARENA PHARMACEUTICALS, INC.
Field: Pharmaceuticals (Chemistry)
Classification: CPC C  A | IPC C

Claim 9:
10. A method for treating an S1P1 receptor-associated disorder in an individual comprising administering to the individual in need thereof a therapeutically effective amount of L-arginine salt of (R)-2-(7-(4-cyclopentyl-3-(trifluoromethyl)benzyloxy)-1,2,3,4-tetrahydrocyclopenta[b]indol-3-yl)acetic acid in the form of a crystalline free-plate habit; wherein said crystalline free-plate habit is formed by a process comprising the steps of:
a) heating a first mixture comprising L-arginine salt of (R)-2-(7-(4-cyclopentyl-3-(trifluoromethyl)benzyloxy)-1,2,3,4-tetrahydrocyclopenta[b]indol-3-yl)acetic acid, a water-miscible anti-solvent, and water to a first heating temperature to form a second mixture;
b) cooling the second mixture to a first cooling temperature followed by adding a first additional amount of the water-miscible anti-solvent to the second mixture while maintaining the first cooling temperature and thereafter heating to a second heating temperature to form a suspension;
c) cycling Step b) optionally once or twice; and
d) cooling the suspension to a second cooling temperature to form the crystalline free-plate habit of L-arginine salt of (R)-2-(7-(4-cyclopentyl-3-(trifluoromethyl)benzyloxy)-1,2,3,4-tetrahydrocyclopenta[b] indol-3-yl) acetic acid,
wherein the S1P1 receptor-associated disorder is selected from the group consisting of rheumatoid arthritis, multiple sclerosis, systemic lupus erythematosus, atopic dermatitis, inflammatory bowel disease, Crohn's disease, and ulcerative colitis.