Phenolic compounds from the aqueous extract of Acacia catechu

From the aqueous extract of Acacia catechu, two new phenolic compounds (3R,4R)-3-(3,4-dihydroxyphenyl)-4-hydroxycyclohexanone (1) and (4R)-5-(1-(3,4-dihydrophenyl)-3-oxobutyl)-dihydrofuran-2(3H)-one (2) were obtained. Their structures were determined on the basis of spectroscopic analysis. Free-radical scavenging activities of them were evaluated.