![Procyanidin B4 Procyanidin B4](/modules/owlapps_apps/img/nopic.jpg)
Procyanidin B4 is a B type proanthocyanidin.
Procyanidin-B4 is a catechin-(4α→8)-epicatechin dimer. It is found in the litchi pericarp, in grape seeds, and, along with 4-cis-isomer of procyanidin B4, in beer.
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