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-(2a,3b,8b,14b,15R*)]-; (+)-Proanthocyanidin A1; Proanthocyanidin A1
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