METHODS Matrine and oxymatrine were isolated from the roots of Sophora tonkinensis by repeated silica gel column chromatography and purified by recrystallization method.

• 目的从山豆根中精制苦参碱和氧化苦参碱,并以此为化学对照品对山豆根药材进行薄层色谱鉴别。