Synonyms: Chryseno[5,6-b]oxiren-4(1H)-one,4a,4b,5,6,10b,10c,11a,11b-octahydro-11b-hydroxy-4a-methyl-8-(1-methyl-4-oxo-2-pentenyl)-,[4aR-[4aa,4bb,8(1R*,2E),10ba,10ca,11aa,11bb]]- (9CI);D(17a)-Homo-18,26,27-trinorcholesta-2,13,15,17,22-pentaene-1,24-dione,6,7-epoxy-5-hydroxy-, (5a,6a,7a,22E)-; Nic 12