Showing structure for 8-(acetyloxy)-8a-[(acetyloxy)methyl]-5,6-dimethyl-5-{2-[(2-methylpropanoyl)oxy]-2-(5-oxo-2h-furan-3-yl)ethyl}-hexahydro-2h-spiro[naphthalene-1,2'-oxiran]-4-yl 2-methylbutanoate