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