中文摘要：

采用各种色谱方法对长尾粗叶木根氯仿部分中的化学成分进行分离纯化，运用现代波谱技术（1D，2DNMR和HRMS等）鉴定化合物的结构，结果分离鉴定了1个新蒽醌化合物：3，8-二羟基-1-甲氧基-2-甲氧基甲基-9，10-蒽醌（Ⅰ），该化合物命名为长尾粗叶木素。

英文摘要：

To study the constituents from the chloroform extract of the roots of Lasianthus acuminatissimus Merr., various chromatographic techniques were used to separate and purify the constituents. The structure was established on the basis of 1D, 2D NMR and HRMS spectroscopic analysis. A new compound was isolated and identified, which was 3, 8-dihydroxy-l-methoxy-2- methoxymethy1-9,10-anthraquinone （Ⅰ）. Compound I is a new anthraquinone, namely lasianthurin.