1179-87-9 16-alpha,17-Dihydroxy-alpha-methylbenzylidenedioxyprogesterone 16alpha,17alpha-Dihydroxyprogesterone acetophenide 16alpha,17alpha-Dihydroxyprogesterone acetophenonide Bovitrol Droxone Isomer I EINECS 214-649-4 NSC 67831 NSC 68280 Pregn-4-ene-3,20-dione, 16,17-((1-phenylethylidene)bis(oxy))-, (16alpha)- (9CI) Pregn-4-ene-3,20-dione, 16alpha,17-dihydroxy-, cyclic acetal with acetophenone (8CI)