A new 1,2-seco-furan-coumarin, claulancoumarin A (1), and a known 1,2-seco-coumarin, (Z)-2,4-dihydroxycinnamic acid (2), were isolated from the branches and leaves of Clausena lansium. Their structures were elucidated by spectroscopic analysis, including NMR and MS.

中文翻译：

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来自 Clausena lansium 的两种 1,2-Seco-香豆素

从枝叶中分离出一种新的 1,2-seco-furan-coumarin, claulancoumarin A (1) 和已知的 1,2-seco-coumarin, (Z)-2,4-dihydroxycinnamic acid (2)克劳塞纳兰西姆。通过光谱分析，包括核磁共振和质谱分析阐明了它们的结构。