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â-D-Glucopyranose,cyclic 3,6-(4,4',5,5',6,6'-hexahydroxy[1,1'-biphenyl]- 2,2'-dicarboxylate) cyclic 2f9:4f1-(3,4,4a,9b-tetrahydro-4,4,4a,6,7- pentahydroxy-3-oxo-1,9- dibenzofurandicarboxylate) 1-(3,4,5-trihydroxybenzoate),stereoisomer