6-chloro-6-dehydro-A-nor steroids with progestational activity. 7-alpha-chloro-a-nor steroids.
D000818:Animals; D002625:Chemistry, Organic; D055601:Organic Chemistry Phenomena; D011374:Progesterone / Q000494:pharmacology; D013256:Steroids / Q000494:pharmacology
D013256:Steroids; D011374:Progesterone