Synonyms: (3S,3aR,4S,6S,6aR,7R,9aS,9bS)-3,6-Diacetoxy-3,6,9-trimethyl-4-[(2-methylbutanoyl)oxy]-2-oxo-2,3,3a,4,5,6,6a,7,9a,9b-decahydroazuleno[4,5-b]furan-7-yl (2Z)-2-methylbut-2-enoate;2-butenoic acid, 2-methyl-, (3S,3aR,4S,6S,6aR,7R,9aS,9bS)-3,6-bis(acetyloxy)-2,3,3a,4,5,6,6a,7,9a,9b-decahydro-3,6,9-trimethyl-4-(2-methyl-1-oxobutoxy)-2-oxoazuleno[4,5-b]furan-7-yl ester, (2Z)-;Archangelolide