16,17-((1-Methylethylidene)bis(oxy))(16 deltaalpha)-pregn-4-ene-3,20-dione 16alpha,17-(Isopropylidenedioxy)pregn-4-ene-3,20-dione 16alpha,17-(Isopropylidenedioxy)progesterone 16alpha,17-Dihydroxypregn-4-ene-3,20-dione cyclic acetal with acetone 16alpha,17-Isopropylidendioxy-4-pregnen-3,20-dion 16alpha,17alpha-Isopropylidenedioxyprogesterone 4968-09-6 ALGESTONE ACETONIDE Algestone acetonide [USAN:BAN] Algestone cyclic acetal with acetone Alphasone acetonide EINECS 225-608-5 NSC 26104 Pregn-4-ene-3,20-dione, 16,17-((1-methylethylidene)bis(oxy)), (16alpha)- Pregn-4-ene-3,20-dione, 16-alpha,17-dihydroxy-, cyclic acetal with acetone Pregn-4-ene-3,20-dione, 16alpha,17-(isopropylidenedioxy)- Progesterone 16,17-acetonide Progesterone, 16-alpha,17-dihydroxy-, cyclic acetal with acetone (6CI) Progesterone, 16alpha,17-(isopropylidenedioxy)- W 3395