CRYSTALLINE FORMS OF 11 BETA-(4-ACETYLPHENYL)-20,20,21,21,21-PENTAFLUOR-17ALPHA- HYDROXY-19-NOR-17 -PREGNA-4,9-DIEN-3-ONE

摘要

Crystalline 11beta -(4-acetylphenyl)-20,20,21,21,21-pentafluoro-17-hydroxy-19-nor-17alpha -pregna-4,9-dien-3-one (I) and its crystalline solvates are new. Independent claims are also included for two processes for preparing (I). ACTIVITY : Cytostatic; Gynecological. MECHANISM OF ACTION : None given.