Patent ID: 9643993
Date: 2017-05-09
CPC Classifications: A61P,C07B,C07J,C30B

Claim:
1. A crystalline polymorphic form C of ulipristal acetate having an X-ray powder diffraction pattern comprising diffraction peaks at the following diffraction 2theta angles: 9.0±0.2°, 9.3±0.2°, 10.8±0.2°, 11.5±0.2°, 12.2±0.2°, 13.1±0.2°, 14.3±0.2°, 15.6±0.2°, 15.7±0.2°, 15.9±0.2°, 16.6±0.2°, 17.6±0.2°, 17.9±0.2°, 18.9±0.2°, 19.3±0.2°, and 23.8±0.2; wherein the crystalline polymorphic form C of ulipristal acetate has a differential scanning calorimetry spectrum comprising an endothermic peak at about 135 to 145° C.