The chemical constituents of Knoxia valerianoides / 药学学报

ABSTRACT

<p><b>AIM</b>To study chemical constituents of Knoxia valerianoides Thorel et Pitard.</p><p><b>METHODS</b>Chromatographic methods were used for the isolation and purification. Structures was elucidated on the basis of chemical analysis and spectroscopic data.</p><p><b>RESULTS</b>Two anthraquinone were isolated from Knoxia valerianoides Thorel et Pitard and identified as 1,3,5-trihydroxy-2-ethoxymethyl-6-methoxyl-anthraquinone (I) and 1,3-dihydroxy-2-ethoxymethyl-anthraquinone (II).</p><p><b>CONCLUSION</b>The compound I was found to be a novel anthraquinone constituent and II was isolated from Knoxia valerianoides Thorel et Pitard for the first time.</p>