[9,9'-Bianthracene]-2,2'-dicarboxylic acid,5,5'-bis(b-D-glucopyranosyloxy)-9,9',10,10'-tetrahydro-4,4'-dihydroxy-10,10'-dioxo-, (R*,R*)-

[9,9'-Bianthracene]-2,2'-dicarboxylic acid,5,5'-bis(b-D-glucopyranosyloxy)-9,9',10,10'-tetrahydro-4,4'-dihydroxy-10,10'-dioxo-, (R*,R*)-