Abstract

A new depside, olivieridepside (1), and a new secoiridoid, olivierigenin (2) were isolated from the aerial parts of Gentiana olivieri Griseb. along with four known compounds, gentiopicroside (3), olivierosides A (4) and B (5) and isoorientin (6). The structures of the isolates were determined by extensive 1 D and 2 D NMR spectroscopy and HR-MS analysis. This is the first report on the occurrence of a depside structure in the genus Gentiana. Moreover, a rare type of non-glycosidic secoiridoid (2) lacking an oxygenated group at C-1 is also being reported for the first time from this genus. The chemotaxonomic importance of the isolates was discussed in detail.

摘要

一种新的 depside，olivieridepside ( 1 )，和一种新的 secoiridoid，olivierigenin ( 2 ) 从Gentiana olivieri Griseb的地上部分中分离出来。以及四种已知化合物龙胆苦苷 ( 3 )、橄榄苷 A ( 4 ) 和 B ( 5 ) 以及异荭草素 ( 6 )。通过广泛的 1 D 和 2 D NMR 光谱和 HR-MS 分析确定分离物的结构。这是关于龙胆属中出现沉降结构的第一份报告。此外，一种罕见的非糖苷类环烯醚萜（2) 在 C-1 处缺乏含氧基团的报道也首次从该属中报道。详细讨论了分离株的化学分类学重要性。