title: [New 18-substituted steroids. I. 18-Methylideneprogesterone (author's transl)].
mesh_terms: D008722:Methods; D011374:Progesterone / Q000031:analogs & derivatives* / Q000138:chemical synthesis
chemical_list: D011374:Progesterone
vernacular_title: Neue 18-substituierte Steroide. I. 18-Methylidenprogesteron.