See R-D-Glucopyranose,cyclic 2,3-[(1S)-4,4′,5,5′,6,6′-hexahydroxy[1,1′- biphenyl]-2,2′-dicarboxylate] cyclic 4,6-[(1S)-3-[5-[[[2,3-O-[[(1S)-4,4′,5,5′,6,6′- hexahydroxy[1,1′-biphenyl]-2,2′-diyl]- dicar