A new biflavone from Dysosma versipellis

This study was conducted to investigate the chemical constituents in the root of Dysosma versipellis (Hance) M. Cheng. The constituents were isolated by silica gel, lichroprep RP-C₁₈ and pharmadex LH-20 column chromatography and the IR, MS, NMR, 2D-NMR spectroscopic analysis were employed for the structural elucidation. Ten compounds were isolated from the 95% ethanol extract of Dysosma versipellis, their structures were elucidated as dysoverine D (1), dysoverine F (2), dysoverine A (3), podoverine A (4), α-peltatin (5), rutin (6), kaempferol-3-O-β-D-glucopyranoside (7), quercetin-3-O-β-D-glucopyranoside (8), kaempferol (9) and quercetin (10). Compound 2 is a new compound, and compounds 1 and 3-6 were isolated from this plant fo r the first time.