Grape seed extract epicatechin gallate

It was reported that esterification of (—)-epicatechin and procyanidin B2 by gallic acid can occur and that these gallate esters are only found in the grape seed extract. Grape seed extract contains oligomer procyanidins made up of dimers or trimers of (+)-catechin and (—)-epicatechin.4-6 The procyanidin dimers are comprised of procyanidins Bl, B2, B3, B4, B5, B6, B7, and B8. There are six procyanidin trimers which include procyanidins Cl and C2. 

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