title: Ring-D-bridged steroid analogs. IX. 19-nor-14alpha, 17alpha-ethano-16alpha-carbomethoxy-4-pregnene-3,20-dione.
mesh_terms: D008956:Models, Chemical; D011278:Pregnanes / Q000138:chemical synthesis* / Q000494:pharmacology; D011374:Progesterone / Q000494:pharmacology; D013329:Structure-Activity Relationship
chemical_list: D011278:Pregnanes; D011374:Progesterone