Studies on chemical constituents of Tibetan medicine Caryopteris toroetii / 中国中药杂志

ABSTRACT

<p><b>OBJECTIVE</b>To study the chemical constituents of the Tibetan medicine Caryopteris toroetii.</p><p><b>METHOD</b>The crude drug was extracted with 95% EtOH and isolated by repeatedly chromatographic methods. The structures of the isolated compounds were elucidated by spectral analysis.</p><p><b>RESULT</b>Six compounds were yielded and identified as: phenethyl cinnamide (1), 1-hydroxy-2, 3, 4, 5-tetramethoxy-xanthone (2), 1-hydroxy-2, 3, 5-trimethoxy-xanthone (3), (2S)-5-hydroxy-7-methoxyflavanone (4), 2', 4'-dihydroxydihydrochalcone (5) and rutin (6).</p><p><b>CONCLUSION</b>All the above compounds were obtained from C. toroetii for the first time.</p>