Showing structure for (9r,9'r)-4,4'-dihydroxy-2,2'-bis(hydroxymethyl)-5,5'-bis({[(2s,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy})-9h,9'h-[9,9'-bianthracene]-10,10'-dione