The phytochemical investigation on the leaves and twigs of Zanthoxylum dimorphophyllum Hemsl led to the isolation of a new compound 7-(4′R-hydroxy-3′,7′-dimethyl-2′E,6′-octadienyloxy) coumarin (1) and fourteen known compounds, including nine coumarins (2–10), one alkaloid (11), three lignans (12–14) and one flavone (15). Their structures were elucidated based on extensive spectroscopic methods (NMR, MS, UV, IR and ECD experiments) and comparison with literature data. The chemotaxonomic significance of the isolated compounds has also been discussed.

中文翻译：

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花椒的成分及其化学分类学意义

对Zanthoxylum dimorphyllum Hemsl的叶子和枝条进行植物化学研究，分离出一种新化合物 7-(4' R -hydroxy-3',7'-dimethyl-2' E ,6'-octadienyloxy) coumarin ( 1 )和十四种已知化合物，包括九种香豆素 ( 2 – 10 )、一种生物碱 ( 11 )、三种木脂素 ( 12 – 14 ) 和一种黄酮 ( 15 )。基于广泛的光谱方法（NMR、MS、UV、IR 和 ECD 实验）并与文献数据进行比较，阐明了它们的结构。还讨论了分离化合物的化学分类学意义。