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Two new C-glucofuranosyl isoflavones of impurities in puerarin injection were isolated.Their structures were determined to be 8-C-α-glucofuranosyl-7,4’-dihydroxyisoflavone and 8-C-β-glucofuranosyl-7,4’-dihydroxy-isoflavone by chemical and spectral analysis.
Two new C-glucofuranosyl isoflavones of impurity in puerarin injection were isolated. Their structures were determined to be 8-C-α-glucofuranosyl-7,4’-dihydroxyisoflavone and 8-C-β-glucofuranosyl-7,4’-dihydroxy- isoflavone by chemical and spectral analysis.