Chemical constituents from Laggera pterodonta

A phytochemical investigation on the aerial parts of Laggera pterodonta resulted in the isolation and identification of fourteen compounds, including six sesquiterpenoids ( 1 – 6 ), five flavonoids ( 7 – 11 ), one lignan ( 12 ), and two pyrrole alkaloids ( 13 , 14 ). Among them, compounds 1 – 3 , 7 – 9 , and 11 are the characteristic class of secondary metabolites of L. pterodonta . Compounds 4 and 5 were firstly isolated from L. pterodonta and this is the first report of the presence of compounds 6 , 10, and 12 from the genus Laggera . Pyrrole alkaloids 13 and 14 may serve as potential chemotaxonomic markers for L. pterodonta and could be used to distinguish among species of Compositae. • Fourteen compounds were isolated from the aerial parts of Laggera pterodonta. • The pyrrole alkaloids were isolated for the first time in the plants of Compositae. • Chemotaxonomic significance of these compounds was discussed.