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