Studies on chemical constituents from roots of Polygonum amplexicaule / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the chemical constituents in the roots of Polygonum amplexicaule var. sinense.</p><p><b>METHOD</b>The 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.</p><p><b>RESULT</b>Eight 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.</p><p><b>CONCLUSION</b>All compounds were isolated from this species for the first time and compounds 1, 3-6 were obtained from this genus for the first time.</p>