Showing structure for 10a,10'a-dimethyl (5r,5'r,6'r,10as,10'as)-1,1',5,5',9,9'-hexahydroxy-3,6'-dimethyl-8,8'-dioxo-5h,5'h,6h,6'h,7h,7'h-[2,4'-bixanthene]-10a,10'a-dicarboxylate