Abstract The phytochemical study of Piper pleiocarpum Chang ex Tseng led to the isolation of eighteen compounds (1–18), including ten lignanoids, galbelgin (1), (+) sesamin (2), denudatin A (3), hancinone (4), (7S,8S, 3′R)-Δ8'-3,3′,4-trimethoxy-3′,6′-dihydro-6′-oxo-7.0.4′,8.3′-lignan[(2S,3S,3aR)-2-(3,4-dimethoxyphenyl)-3,3a-dihydro-3a-methoxy-3-methyl-5-(2-propenyl)-6(2H))-benzofuranone] (5), (−)-(7R,8R)-machilin D (6), (1R,2R)-2-[2-methoxy-4-((E)-prop-1-enyl)phenoxy]-1-(3,4-dimethoxyphenyl)propyl acetate (7), piperbonin A (8), machilin D (9), 4-methoxymachilin D (10), one amide alkaloid, Δα,β-dihydropiperine (11), six polyoxygenated cyclohexenes, ent-curcuminol F (12), uvaribonol E (13), ellipeiopsol A (14), 1S,2R,3R,4S-1-ethoxy-2-[(benzoyloxy)methyl]cyclohex-5-ene-2,3,4-triol, 3-acetate (15), (+)-crotepoxide (16), (+)-senediol (17), and one benzoate derivative, 2-acetoxybenzyl benzoate (18). Their structures were established by spectroscopic data and by comparison with the literature. All the compounds were firstly isolated from P. pleiocarpum, while ten compounds 6–7, 9–10, 12–15, 17–18 were isolated from the genus Piper and the family Piperaceae for the first time. The chemotaxonomic significance of these compounds was also discussed. The isolation of compounds 6–7, 9–10 may be used as chemotaxonomic markers for the genus of Piper.

中文翻译：

---

槭树的植物化学和化学分类学研究

和一种苯甲酸酯衍生物，苯甲酸2-乙酰氧基苄酯(18)。它们的结构是通过光谱数据和与文献比较确定的。所有化合物均首次从多果松中分离得到，其中10个化合物6-7、9-10、12-15、17-18为首次从胡椒属和胡椒科中分离得到。还讨论了这些化合物的化学分类学意义。化合物 6-7、9-10 的分离可用作 Piper 属的化学分类标记。还讨论了这些化合物的化学分类学意义。化合物 6-7、9-10 的分离可用作 Piper 属的化学分类标记。还讨论了这些化合物的化学分类学意义。化合物 6-7、9-10 的分离可用作 Piper 属的化学分类标记。