20-keto-11.beta.-arylsteroids and their derivatives having agonist or
申请人:Research Triangle Institute
公开号:US06020328A1
公开(公告)日:2000-02-01
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.