Flavonoids from rhizome of Alpinia tonkinensis / 中国中药杂志

ABSTRACT

<p><b>OBJECTIVE</b>To find out the bioactive principles of Alpinia tonkinensis, by investigating its chemical constituents.</p><p><b>METHOD</b>It was extracted with MeOH, distributed by different solvents, and isolated via column chromatography on silica gel.</p><p><b>RESULT</b>Six compounds were elucidated through spectral analysis, which were as follows 4',7-dimethylkaempferol(I), 5-hydroxy-3',4',7-trimethoxyflavanone(II), kumatakenin(III), 4',5,7-trimethoxyflavonol(IV), ombuine(V), and kaempferol(VI).</p><p><b>CONCLUSION</b>Six flavonoids were isolated from this plant for the first time, and so were four compounds from genus Alpinia.</p>