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