1179-87-9 16.alpha.,17-Dihydroxyprogesterone acetophenide 16.alpha.,17.alpha.-Dihydroxyprogesterone acetophenide 16.alpha.,17.alpha.-Dihydroxyprogesterone acetophenonide Bovitrol Droxone Isomer I NSC67831 Pregn-4-ene-3,20-dione, 16,17-[(1-phenylethylidene)bis(oxy)]-, (16.alpha.)- Pregn-4-ene-3,20-dione, 16.alpha.,17-dihydroxy-, cyclic acetal with acetophenone