title: Synthesis of corticosteroid derivatives containing the 20beta-o1-21-al side chain.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D006914:Hydroxysteroids / Q000138:chemical synthesis; D007664:Ketosteroids / Q000138:chemical synthesis; D008722:Methods; D011283:Pregnenes / Q000138:chemical synthesis*
chemical_list: D006914:Hydroxysteroids; D007664:Ketosteroids; D011283:Pregnenes