2. Condensed tannin (Proanthocyanidins )
Oligomeric flavonoids
I. Hydrolysable tannins
Galloyl and hexahydroxydiphenoyl esters and their derivatives. (found as
multiple esters with glucose).
Gallotannins Ellagitannins
Gallic acid esters hexahydroxydiphenyl esters
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