Phytochemical study of the chloroform extract of the aerial parts of Inula germanica L., I. ensifolia L., I. conyza (Griess.) DC. and I. salicina L. led to the identification of 33 terpenoids. ?- and ?-amyrin, lupeol, taraxasterol, ?-taraxasterol and their 3-O-acetates and 3-O-palmitates were identified by GC/MS. In addition, the structures of 3-O-palmitates of mainaladiol, arnidiol, faradiol and 16-hydroxylupeol were confirmed by NMR. ent-Kaur-16-en-19- -oic acid and its 15?-(3-methylpentanoyloxy) and 15?-(3-methylbutanoyloxy) derivatives were isolated from I. conyza. Ten closely related sesquiterpene lactones (germacranolides and melampolides) were found in I. germanica and their structural identification was performed by spectral analyses. I. ensifolia and I. salicina were free of sesquiterpene lactones and diterpenoids. All triterpenoids and diterpenoids, grazielia acid, desacetylovatifolin and 8-(2-methylbutanoyloxy)- 1(10),4,11(13)-germacrutrien-6,12-olide-14-oic acid are described for the first time in the studied species. The principal component analysis was used to find a relationship between th? investigated up to now Inula species, growing in Bulgaria.
通过对 Inula germanica L.、I. ensifolia L.、I. conyza (Griess.) DC.和 I. salicina L.气生部分的氯仿提取物进行植物化学研究,鉴定出 33 种萜类化合物。通过气相色谱/质谱(GC/MS)鉴定了"-"和"-"阿米林"、"羽扇豆醇"、"蒲公英甾醇"、"蒲公英甾醇 "及其 3-O-乙酸酯和 3-O-棕榈酸酯。此外,还通过核磁共振确认了mainaladiol、arnidiol、faradiol 和 16-hydroxylupeol 的 3-O-棕榈酸酯的结构。从 I. conyza 中分离出 ent-Kaur-16-en-19-oic acid 及其 15?-(3-甲基戊酰氧基)和 15?-(3-甲基丁酰氧基)衍生物。在 I. germanica 中发现了 10 种密切相关的倍半萜内酯(germacranolides 和 melampolides),并通过光谱分析进行了结构鉴定。I. ensifolia 和 I. salicina 不含倍半萜内酯和二萜。所有三萜类和二萜类化合物、grazielia 酸、去乙酰vatifolin 和 8-(2-甲基丁酰氧基)- 1(10),4,11(13)-germacrutrien-6,12-olide-14-oic acid 都是首次在所研究的物种中发现。研究人员利用主成分分析法找到了生长在保加利亚的茵陈物种之间的关系。