Mifepristone est synthetica steroidis composita cum antiprogesterone et antiglucocorticoideis proprietatibus. Compositum est 19-neque steroid cum substitutionibus in positionibus C11 et C17 (17 beta-hydroxy-11 beta-[4-dimethylamino phenyl] 17 alpha-[1-propynyl]extra-4, 9-dien-3-one), quae actio cortisol contrariatur receptor certatim in gradu. Mifepristone progesterone receptor adversario usus abortifaciens primis graviditatis mensibus., et minor …