title: 6,6-difluoro-19-norprogesterone.
mesh_terms: D000818:Animals; D005260:Female; D005298:Fertility / Q000187:drug effects; D005461:Fluorine; D007259:Infrared Rays; D013058:Mass Spectrometry; D009654:Norsteroids / Q000138:chemical synthesis* / Q000494:pharmacology; D009904:Optical Rotation; D011374:Progesterone / Q000138:chemical synthesis* / Q000494:pharmacology; D011372:Progestins / Q000138:chemical synthesis / Q000494:pharmacology; D011817:Rabbits; D013057:Spectrum Analysis; D014466:Ultraviolet Rays
chemical_list: D009654:Norsteroids; D011372:Progestins; D005461:Fluorine; D011374:Progesterone