Studies on chemical constituents of flavones from Lobelia chinensis Lour

Objective To study the chemical constituents of flavones in Lobelia chinensis Lour.Method The chemical constituents of flavones in Lobelia chinensis Lour were extracted with 70% ehtonal and isolated by various coloumn chromatography and recrystallization,and identified by various kinds of spectroscopic methods.Results 9 flavanoids were isolated and identified as apigenin(1),loteolin(2),Diosmetin(3),chrysoeriol(4),hesperidin(5),loteolin-7-O-β-D-glucoside(6),apigenin-7-O-β-D-glucoside(7),linarin(8)and diosmin(9).Conclusion All of these compouds were obtained from Lobelia chinensis Lour. for the first time.