Studies on the tannins of babul, Acacia arabica, bark

Abstract

The isolation and characterization of quercetin, gallic acid, (+)-catechin, (-)-epicatechin, (-)-dicatechin, and (+)-leucocyanidin gallate from the acetone extract of babul, Acacia Arabica, is reported. The presence of (+)-dicatechin and (+)-leucocyanidin gallate was noted for the first time in nature. Their structure was established on the basis of a number of oxidative and degradative experiments.