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