A new flavonoid from heartwood of Caesalpinia sappan / 中国中药杂志

<p><b>OBJECTIVE</b>To seek for new active components from Caesalpinia sappan.</p><p><b>METHOD</b>The chemical constituents were isolated and identified by means of chromatographic and spectroscopic technologies methods.</p><p><b>RESULT</b>Nine compounds were isolated, and their structures were identified as 3, 8-dihydroxy4, 10-dimethoxy-7-oxo-[2] benzopyrano[4,3-b] benzopyran (1), 3-deoxysappanchalcone (2), sappanchalcone (3), 3-deoxysappanone B (4), rhamnetin (5), protosappanin C (6), 3, 7-dihydroxy-chroman-4-one (7), dimethyl adipate (8), daucosterin (9).</p><p><b>CONCLUSION</b>Compound 1 was a new compound, and compounds 7, 8 were isolated from this plant for the first time.</p>