Chemical constituents from Laggera pterodonta and their anti-inflammatory activities in vitro

Abstract A phytochemical investigation on the aerial parts of Laggera pterodonta resulted in the isolation and identification of 23 compounds, including twelve sesquiterpenoids (1–12), two norisoprenoids (13, 14), three alkaloids (15-17), one lignan (18), and five flavonoids (19-23). Among them, norpterodonols A (1) and B (2) are two undescribed norsesquiterpenoid derivatives. Their structures were established on the basis of NMR and HR-ESI-MS spectroscopic analysis. All isolates were evaluated for their inhibitory effects on the NO production in LPS-induced RAW 264.7 macrophages, and compounds 8, 10, 16, 18, 20, 21, and 23 were shown to have obvious anti-inflammatory effects.