title: 17 -Propadienyl, 17 -propynyl, and 17 -trifluoropropynyl analogs of 6,6-difluoronorethindrone.
mesh_terms: D000284:Administration, Oral; D000475:Alkenes / Q000008:administration & dosage / Q000138:chemical synthesis; D000480:Alkynes / Q000008:administration & dosage / Q000138:chemical synthesis; D000818:Animals; D002855:Chromatography, Thin Layer; D005260:Female; D005461:Fluorine; D007259:Infrared Rays; D009640:Norethindrone / Q000008:administration & dosage / Q000138:chemical synthesis*; D009904:Optical Rotation; D011372:Progestins / Q000008:administration & dosage / Q000138:chemical synthesis*; D011817:Rabbits; D013057:Spectrum Analysis; D013329:Structure-Activity Relationship
chemical_list: D000475:Alkenes; D000480:Alkynes; D011372:Progestins; D005461:Fluorine; D009640:Norethindrone