title: SOME 20-SUBSTITUTED 21-NORPROGESTERONE DERIVATIVES.
mesh_terms: D002626:Chemistry, Pharmaceutical; D009653:Norprogesterones; D010600:Pharmacology; D011372:Progestins; D012106:Research
chemical_list: D009653:Norprogesterones; D011372:Progestins
keywords: CHEMISTRY, PHARMACEUTICAL; EXPERIMENTAL LAB STUDY; PHARMACOLOGY; PROGESTATIONAL HORMONES