16α-17α-Epoxy-Δ4-pregnen-3,20-dione16α,17α-EPOXYPROGESTERONE(6aR,6bS,8aS,8bS,9aR,10aS,10bR)-8b-acetyl-6a,8a-dimethyl-5,6,6a,6b,7,8,8a,8b,9a,10,10a,10b-dodecahydro-1H-naphtho[2',1':4,5]indeno[1,2-b]oxiren-4(2H)-one16α,17α-Epoxy-4-pregnen-3,20-dione16α,17α-Epoxyprogesterone