20-keto-11.beta.-arylsteroids and their derivatives having agonist or antagonist hormonal properties
Cook, C., Kepler, J., Zhang, P., Lee, Y., & Tallent, C. (2000). IPC No. U.S.20-keto-11.beta.-arylsteroids and their derivatives having agonist or antagonist hormonal properties (Patent No. 6020328.)
The invention is directed to 20-keto-11.beta.-arylsteroids of formula I: ##STR1## wherein R.sup.1, R.sup.6, R.sup.7, R.sup.9, R.sup.12 and X are as defined by the specification. The compounds exhibit progestational and antiprogestational activities.