Cleavage of the interflavanyl bond in 5-deoxy (A ring) proanthocyanidins

Abstract
The fisetinidol-(4,8) and (4,6)-catechin profisetinidin biflavanoids 1,4 and 5 respectively, are subject to facile cleavage of the interflavanyl linkage with sodium cyanoborohydride in trifluoroacetic acid at 0 °C.

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