Abstract In this study the volatile components of four Inula species (Inula germanica L., I. bifrons (L.) L., I. ensifolia L., and I. salicina L.) were analysed by GC-FID/MS. A total of 141 chemical compounds were identified. A distinct volatile chemical profiles with high variation in the type of compounds was observed. Inula germanica was rich in oxygenated monoterpenes (54.7%), with cis-carvyl acetate (20.7%) and 1,8-cineole (14.6%) as main components. Sesquiterpenoids dominated in I. bifrons (60.3%), while the relatively high percentage of fatty acids characterized the other two species I. ensifolia and I. salicina (44.1 and 39.8%, respectively). Principal component analysis (PCA) and cluster analysis (CA) were used to investigate the variations in the volatiles of different Inula species.

中文翻译：

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四种源自保加利亚的 Inula 物种的挥发性成分

摘要 在本研究中，通过 GC-FID/MS 分析了四种 Inula 物种（Inula Germanica L.、I. bifrons (L.) L.、I. ensifolia L. 和 I. salicina L.）的挥发性成分。共鉴定出 141 种化合物。观察到了一种明显的挥发性化学特征，化合物的类型变化很大。Inula Germanica 富含含氧单萜 (54.7%)，主要成分为醋酸顺式香芹酯 (20.7%) 和 1,8-桉树脑 (14.6%)。倍半萜类化合物在 I. bifrons 中占主导地位 (60.3%)，而相对较高百分比的脂肪酸是其他两个物种 I. ensifolia 和 I. salicina 的特征（分别为 44.1% 和 39.8%）。使用主成分分析 (PCA) 和聚类分析 (CA) 来研究不同 Inula 物种挥发物的变化。