Chemical constituents in herb of Polygonum orientale II / 中国中药杂志

ABSTRACT

<p><b>OBJECTIVE</b>To study the chemical constituents of the essential substance from the Polygonum oriental.</p><p><b>METHOD</b>Chromatographic techniques were employed for isolation and purification of the constituents and their structures were determined by spectral analysis and chemical evidence.</p><p><b>RESULT</b>Seven compounds were obtained and identified as ombuine-3-O-beta-D-galactopyranoside (1), ombuine-3-O-rutinoside (2), tryptophan (3), quercetin-3-O-methyl ether (4), kaempferol-3-O-(2"-O-alpha-L-rhamnopyranosyl) -beta-D-glucuronopyranoside (5), quercetin-3-O-(2"-O-alpha-L-rhamnopyranosyl)-beta-D-glucuronopyranoside (6), quercetin-3-O-beta-D-glucuronide (7).</p><p><b>CONCLUSION</b>Compounds 4-7 were isolated from P. oriental for the first time and compounds 1-3 were firstly obtained from the genus Polygonum. The total 1H and 13C-NMR date of compound 1 were assigned for first time.</p>