title: The conversion of podocarpic acid to an 18-nor steroid.
mesh_terms: D002264:Carboxylic Acids; D007664:Ketosteroids; D008722:Methods; D009654:Norsteroids / Q000138:chemical synthesis*; D010616:Phenanthrenes
chemical_list: D002264:Carboxylic Acids; D007664:Ketosteroids; D009654:Norsteroids; D010616:Phenanthrenes