Showing structure for (3s,4r,6's,7r)-7-(acetyloxy)-5-[(3s,4r,6'r,7r)-4,7-bis(acetyloxy)-6',7-dimethyl-6,8-dioxo-4h-spiro[2-benzopyran-3,2'-oxan]-5-yl]-6',7-dimethyl-6,8-dioxo-4h-spiro[2-benzopyran-3,2'-oxan]-4-yl acetate