(6aR,6bS,8aS,8bS,11aR,12aS,12bR)-8b-acetyl-6a,8a,10,10,12a-pentamethyl-5,6,6a,6b,7,8,8a,8b,11a,12,12a,12b-dodecahydro-1H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-4(2H)-one;16alpha,17alpha-Isopropylidenedioxyprogesterone;Progesterone 16,17-acetonide;16alpha,17-(propane-2,2-diyldioxy)pregn-4-ene-3,20-dione;16alpha,17-Isopropylidendioxy-4-pregnen-3,20-dion;16a,17-(isopropylidenedioxy)pregn-4-ene-3,20-dione