Korlym (mifepristone) is a cortisol receptor blocker for oral administration. The chemical name of mifepristone is 11?-(4-dimethylaminophenyl)-17?-hydroxy-17?-(1-propynyl)-estra-4, 9-dien-3-one. The chemical formula is C29H35NO2; the molecular weight is 429.60; and the structural formula is: