Abstract: To investigate the chemical constituents from the ethanolic extract of Trifolium pratense. Eight known compounds were isolated by using various column chromatographies and identified on the basis of spectral analysis. These compounds are prunetin (1), irilone (2), biochanin A (3), formononetin (4), pratensein (5), genistein (6), calycosin (7) and daidzein (8).

Key words: Trifolium pratense, chemical constituent, isoflavones

摘要： 对国产红车轴草（Trifolium pratense L.）乙醇提取物的乙酸乙酯部分进行化学成分研究。采用溶剂处理和各种色谱方法从中分离得到了8个异黄酮化合物，并利用波谱技术鉴定了结构。这8个化合物分别为樱黄素、德鸢尾素、鹰嘴豆芽素A、芒柄花素、红车轴草素、染料木素、毛蕊异黄酮和大豆素。

关键词: 红车轴草, 化学成分, 异黄酮化合物