8,?14-?Methano-?2H,?14H-?1-?benzopyrano[7,?8-?d]?[1,?3]?benzodioxocin-?3,?5,?11,?13,?15-?pentol, 2,?8-?bis(3,?4-?dihydroxyphenyl)?-?3,?4-?dihydro-?, (2R,?3R,?8S,?14R,?15R)?- 8,14-Methano-2H,14H-1-benzopyrano[7,8-d][1,3]benzodioxocin-3,5,11,13,15-pentol, 2,8-bis(3,4-dihydroxyphenyl)-3,4-dihydro-, [2R-(2α,3α,8β,14β,15R*)]-
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(+)-Proanthocyanidin A2 is a polyphenol oxidase (PPO) substrates isolated from grape seeds (Vitis vinifera L). Proanthocyanidins represent one of the major groups of plant polyphenols. A2 could isolated from the acetone-water extract (7:3, v/v) of horse chestnut seed shells (Aesculus hyppocastanum), after extraction with ethyl acetate, by combined LH-20 chromatography and TLC on Silicagel 60 plates.
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