title: An improved preparation of 3-alpha-acetoxy-11,20-diketo-(5-beta)-pregnane, the key intermediate in the synthesis of 11-oxygenated corticosteroids.
mesh_terms: D001647:Bile Acids and Salts; D055598:Chemical Phenomena; D002621:Chemistry; D007659:Ketones; D011278:Pregnanes / Q000138:chemical synthesis*
chemical_list: D001647:Bile Acids and Salts; D007659:Ketones; D011278:Pregnanes