Antioxidant compounds from the stem bark of Sorbus commixta

Abstract

The MeOH extract of Sorbus commixta (Rosaceae) exhibited strong DPPH radical scavenging activity, and through activity-guided fractionation two antioxidant compounds were isolated and identified as catechin-7-O-β-D-xylopyranoside (1) and catechin-7-O- β-D-apiofuranoside (2) by physicochemical and spectrometric methods. To evaluate the antioxidant effect of these compounds, some in vitro tests, such as the DPPH radical scavenging activity test, the superoxide radical scavenging activity test and the lipid peroxidation inhibitory activity test, were performed. Compounds 1 and 2 showed stronger activities than both α-tocopherol and butylated hydroxy anisole (BHA) in each assay.