Synonyms: (4S)-3,4aβ-Dimethyl-4β,6β-bis[[(Z)-2-methyl-2-butenoyl]oxy]-4,4a,5,6,7,8,8aβ,9-octahydronaphtho[2,3-b]furan-5β-carboxylic acid;(4S)-4,4a,5,6,7,8,8aβ,9-Octahydro-3,4aβ-dimethyl-4β,6β-bis[[(Z)-2-methyl-1-oxo-2-butenyl]oxy]naphtho[2,3-b]furan-5β-carboxylic acid;(4S)-4,4a,5,6,7,8,8aβ,9-Octahydro-4β,6β-bis[(Z)-2-methyl-2-butenoyloxy]-3,4aβ-dimethylnaphtho[2,3-b]furan-5β-carboxylic acid;(4S)-4β,6β-Bis[[(Z)-2-methyl-2-butenoyl]oxy]-3,4a-dimethyl-4,4aβ,5,6,7,8,8aβ,9-octahydronaphtho[2,3-b]furan-5β-carboxylic acid;3β,6β-Bisangeloyloxyfuranoeremophilan-15-oic acid