OBJECTIVETo investigate the chemical constituents in the roots of Polygonum amplexicaule var. sinense.

METHODThe compounds were isolated by column chromatography on silica gel and Sephadex LH-20. The structures were identified by means of IR, 1H-NMR, 13C-NMR and MS analyses.

RESULTEight compounds were isolated and identified as friedelin (1), beta-sitosterol (2), simiarenone (3), angelicin (4), psoralen (5), palmitic acid (6), (-)-epicatechin (7), and quercetin (8), respectively.

CONCLUSIONAll compounds were isolated from this species for the first time and compounds 1, 3-6 were obtained from this genus for the first time.

Magnetic Resonance Spectroscopy ; Mass Spectrometry ; Organic Chemicals ; analysis ; isolation & purification ; Plant Roots ; chemistry ; Polygonum ; chemistry