(+)-Catechin-5-galloyl Ester as a Novel Natural Polyphenol from the Bark of<i>Acacia nilotica</i>of Sudanese Origin¹

Abstract

From the bark of ACACIA NILOTICA subsp. TOMENTOSA a novel polyphenol, (+)-catechin-5-galloyl ester ( 5), was isolated along with gallic acid ( 1), its methyl ester ( 2), naringenin ( 3), and (+)-catechin ( 4). The structure of 5 was determined by use of mass spectrometry as well as (1)H- and (13)C-NMR spectroscopy.