55593-54-9 (1aS,4E,8E,10aR,13aS,14aS)-1a,3,6,7,10,10a,11,13a,14,14a-Decahydro-4,8,14a-trimethyl-11-methyleneoxireno[12,13]cyclotetradeca[1,2-b]furan-12(2H)-one 96552-83-9 (2S)-2β-(3-Furyl)-9α-hydroxy-6aα,10bβ-dimethyl-4-oxo-1,4,4aα,5,6,6a,9,10,10aα,10b-decahydro-2H-naphtho[2,1-c]pyran-7-carboxylic acid methyl ester