Chemical constituents of Knoxia valerianoides / 药学学报

ABSTRACT

<p><b>AIM</b>To study the chemical constituents of Knoxia valerianoides Thorel et Pitard.</p><p><b>METHODS</b>Chromatographic methods were used for the isolation and purification. Structures were elucidated on the basis of chemical analysis and spectroscopic data.</p><p><b>RESULTS</b>Three anthraguinones were isolated from K. valerianoides and identified as 1, 3, 5-trihydroxy-2-methyl-6-methoxyl-anthraguinone (kaoxiadin, I), 1, 3, 6-trihydroxy-5-ethoxylmethyl-anthraguinone (II) and 1, 3-dihydroxy-2-methylanthraguinone (rubiadin, III).</p><p><b>CONCLUSION</b>Compound II is a new anthraguinone constituent.</p>