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