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Tergallic acid : ウィキペディア英語版 | Tergallic acid Tergallic acids are trimers of gallic acid, often found naturally in the form of glycosides. Tergallic acid O- or C-glucosides that can be found in acorns of several ''Quercus'' (oak) species. The dehydrated tergallic acid C-glucoside and tergallic acid O-glucoside can be characterised in the acorns of ''Quercus macrocarpa''. Dehydrated tergallic-C-glucoside (m/z 613) can be found in the cork from ''Quercus suber''. Tergallic acid glucosides can also be found in ''Terminalia chebula''.〔(''Terminalia chebula'' ) on www.mmh-mms.com〕 Tergallic acid dilactone can be found in ''Rhynchosia volubilis'' seeds. The chemical formula is not the same as given by Kinjo ''et al.''〔 (molecule with an ether link between the ellagic and gallic acid residues) or by Cantos,〔 Chapman〔 and Fernandes ''et al.''〔 (molecule with a carbon-carbon link). Cantos, Fernandes and Chapman called the molecule with an ether link valoneic acid dilactone while Kinjo and Shuaibu ''et al.'' called the molecule with a carbon-carbon link flavogallonic acid dilactone. ==References==
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