IUPAC:(3aR,4R,4aS,5R,8R,8aR,9S,9aR)-8,9-bis(acetyloxy)-5-hydroxy-5,8a-dimethyl-3-methylidene-2-oxo-dodecahydronaphtho[2,3-b]furan-4-yl 2-methylprop-2-enoate
IUPAC:(3aR,4R,4aS,5R,8R,8aR,9S,9aR)-8,9-bis(acetyloxy)-5-hydroxy-5,8a-dimethyl-3-methylidene-2-oxo-dodecahydronaphtho[2,3-b]furan-4-yl 2-methylprop-2-enoate