11B-(p-SUBSTITUTED PHENYL)-20,20,21,21,21-PENTAFLUORO-17-HYDROXY-19-NOR-17ALPHA-PREGNA-4,9-DIEN-3-ONES, DRUGS CONTAINING THEM AND INTERMEDIATES IN THEIR PREPARATION

摘要

The present invention relates to progesterone receptor antagonists of general formula I: in which R1 can be a hydrogen atom and R2 a hydroxyl group or R1 and R2 together can be an oxo group.