Procyanidin B2
Procyanidin B2 is a B type proanthocyanidin. Its structure is -Epicatechin---epicatechin.
Procyanidin B2 can be found in Cinchona pubescens, in Cinnamomum verum, in Crataegus monogyna, in Uncaria guianensis, in Vitis vinifera, in Litchi chinensis, in the apple, and in Ecdysanthera utilis.
Procyanidin B2 can be converted into procyanidin A2 by radical oxidation using 1,1-diphenyl-2-picrylhydrazyl radicals under neutral conditions.
Procyanidin B2 has been shown to inhibit the formation of the advanced glycation end-products pentosidine, carboxymethyllysine , and methylglyoxal .
