A new depside and a new secoiridoid from the aerial parts ofGentiana olivierifrom flora of Turkey

A new depside, olivieridepside (1), and a new secoiridoid, olivierigenin (2) were isolated from the aerial parts ofGentiana olivieriGriseb. 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 genusGentiana. 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.

Automated summary

A new depside and a new secoiridoid, along with four known compounds, were isolated from Gentiana olivieri. This is the first report on the occurrence of a depside structure in the genus Gentiana. Moreover, a rare type of non-glycosidic secoiridoid lacking an oxygenated group at C-1 is also being reported for the first time from this genus.