Showing structure for (1s,2s,3r,4as,5s,5's,8as)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2h-spiro[naphthalene-1,3'-oxolan]-4a-ylmethyl acetate