Patent ID: 8513228

Claim:
Crystalline anhydrate Form A of 17α-acetoxy-21-methoxy-11β-[4-N,N-dimethylaminophenyl]-19-norpregna-4,9-diene-3,20-dione characterized in that it provides one or more of: a) having characteristic X-ray powder diffractions at about 7.9, 11.0, 13.4[°]2θ; b) having characteristic FT Raman absorption bands at about 2952, 2836, 1600, 1215, 1199, 441 cm −1 ; c) having a 13 C solid-state NMR spectrum comprising characteristic resonances at about 203.1, 202.1, 170.2, 26.4, 15.2, 14.8 ppm.