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