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