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Characterization of proanthocyanidin oligomers proceeds commonly through investigation of NMR data of their peracetates or methyl ether acetates, in conjunction with FAB-mass spectrometry and circular dichroism. Since such an approach is unsuitable in bioassay-guided isolations, we applied two-dimensional NMR techniques for the identification of dimeric proanthocyanidins. This afforded not only a...
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