title: Aliphatic esters of 6,6-difluoro-17 -hydroxy-17-ethynyl-4-estren-3-one (6,6-difluoronorethindrone) and (+)-6,6-difluoro-13 -ethyl-17 -hydroxy-17-ethynyl-4-gonen-3-one ((+)-6,6-difluoronorgestrel).
mesh_terms: D000818:Animals; D002855:Chromatography, Thin Layer; D004952:Esters / Q000138:chemical synthesis / Q000494:pharmacology; D005260:Female; D005461:Fluorine; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008722:Methods; D009640:Norethindrone / Q000138:chemical synthesis* / Q000494:pharmacology; D009644:Norgestrel / Q000494:pharmacology; D011817:Rabbits; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D014599:Uterus / Q000187:drug effects
chemical_list: D004952:Esters; D005461:Fluorine; D009644:Norgestrel; D009640:Norethindrone