Showing structure for 3',7-dimethyl (9'r)-6'-[(9r)-2,5-dihydroxy-3-(methoxycarbonyl)-4-methyl-9-{[(2r)-2-methylbutanoyl]oxy}-10-oxoanthracen-9-yl]-1,2',5',6-tetrahydroxy-4',8-dimethyl-9'-{[(2r)-2-methylbutanoyl]oxy}-9,10,10'-trioxo-[2,9'-bianthracene]-3',7-dicarboxylate