title: [An improved method for the introduction of C21-OAC in the pregnen series (author's transl)].
mesh_terms: D015065:17-Hydroxycorticosteroids / Q000138:chemical synthesis*; D003348:Cortisone / Q000031:analogs & derivatives* / Q000138:chemical synthesis; D003350:Cortodoxone / Q000031:analogs & derivatives / Q000138:chemical synthesis*
chemical_list: D015065:17-Hydroxycorticosteroids; D003348:Cortisone; D003350:Cortodoxone