title: Studies in in the steroid group. LXXXII. The preparation of nine mono- and eight di-oxoandrostanes, 5 -estran-17-one, and 5 -pregnane-2,20-dione.
mesh_terms: D000731:Androstanes / Q000138:chemical synthesis*; D055598:Chemical Phenomena; D002621:Chemistry; D004962:Estranes / Q000138:chemical synthesis*; D006900:Hydroxylation; D007664:Ketosteroids / Q000138:chemical synthesis; D008722:Methods; D010100:Oxygen; D011278:Pregnanes / Q000138:chemical synthesis*
chemical_list: D000731:Androstanes; D004962:Estranes; D007664:Ketosteroids; D011278:Pregnanes; D010100:Oxygen