| 摘要 |
The present invention relates to novel crystalline Form II of 17α-acetoxy-21-methoxy-11&bgr;-[4-N,N-dimethylaminophenyl]-19-norpregna-4,9-diene-3,20-dione, (also known as CDB-4124), processes for the preparation thereof and pharmaceutical composition comprising it. Form II can be crystallized from different medium such as esters of C-Calcohols and carboxylic acids, ketones, cyclohexane, acetonitrile, dimethylformamide, dimethyl sulfoxide, water and any mixture thereof. |
