Showing structure for 4-{1,5-dihydroxy-6-[(2r,4r,5s,6r)-4-hydroxy-6-methyl-5-{[(2s,5s,6s)-6-methyl-5-{[(2r,6s)-6-methyl-5-oxo-2,6-dihydropyran-2-yl]oxy}oxan-2-yl]oxy}oxan-2-yl]-9,10-dioxoanthracen-2-yl}-3-hydroxy-3-methylbutanoic acid