Plant Polyphenols: Vegetable Tannins Revisited

13C nmr Acacia anthocyanidins aromatic astringency B-penta-O-galloyl-D-glucose bark Bate-Smith biogenetic biosynthesis caffeine Camellia sinensis carbocation casuarictin catechin catechin 33 characteristic Chem chemistry collagen complexation compounds condensed tannins conformation cyanidin D-glucopyranose D-glucose depside derived dimers ellagitannins enzyme epicatechin epicatechin 31 extracts Fagaceae Figure flavan flavan-3-ol flavan-3-ol units flavonoids fruit gallate gallic acid gallotannins galloyl ester groups galls geraniin glucoside Haslam herbal higher plants hydrolysable tannins hydroxyl hydroxyl group interflavan bond intermediate isolated leaf leather leucoanthocyanins Mayer metabolism molecules Nonaka and Nishioka nucleophilic occur OH HO OH OH OH OH Okuda oligomeric oligomers oxidative coupling pathways Pharm phenolic Phytochemistry plant families plant polyphenols plant tissues polymeric polymerisation polyphenols Porter precipitation proan procyanidin procyanidin B-2 prodelphinidin protein proton Quercus sp reaction Roux Schmidt secondary metabolites soluble species stereochemistry structure Table tannage tannins Tannins and related tellimagrandin tion Valoneic acid vegetable tannins vide supra Weinges wine он Рон