Patent ID: 11891373
Assignee: PFIZER INC.
Field: Pharmaceuticals (Chemistry)
Classification: CPC C  A | IPC A  C

Claim 1:
2. A process for preparing a crystalline form of 1-((2R,4R)-2-(1H-benzo[d]imidazol-2-yl)-1-methylpiperidin-4-yl)-3-(4-cyanophenyl)urea maleate, having the structure:, , and having a powder X-ray diffraction pattern comprising peaks at 2θ values of: 11.6, 12.1 and 19.6 °2θ±0.2 °2θ, said process comprising treating 1-((2R,4R)-2-(1H-benzo[d]imidazol-2-yl)-1-methylpiperidin-4-yl)-3-(4-cyanophenyl)urea imidazole complex (1:1) with maleic acid.