Studies of the chemical constituents of Swertia davida Franch / 药学学报

ABSTRACT

<p><b>AIM</b>To study the active constituents of Swertia davidi Franch..</p><p><b>METHODS</b>Chromatography was used to isolate and purify the chemical components, their structures were identified by spectral analysis.</p><p><b>RESULTS</b>Three compounds were identified as 1,7-dihydroxy-3,8-dimethoxyxanthone (gentiacaulein) (V), 1,8-dihydroxy-3,7-dimethoxyxanthone (methylswertianin) (VI) and 1,8-dihydroxy-3,4,7-trimethoxyxanthone (VII).</p><p><b>CONCLUSION</b>Compound VII is a novel xanthone, named daviditin A, the others were isolated from Swertia davidi Franch. for the first time.</p>