Triterpenoids and flavonoids from the air-dried aerial parts of plantago amplexicaulis

From the air-dried aerial parts of Plantago amplexicaulis, two new triterpenoids namely, 3 beta-hydroxyolean-12-en-28-al and 11 alpha, 12 alpha-Epoxy-3 beta, 23-dihydroxy-30-norolean-20 (29)-en-28, 13 beta-olide were isolated. Two flavonoids, kaempferol-3-O-beta-D-glucoside and kaempferol-3,7-di-O-beta-D-glucoside were also extracted and identified. The structures were established by conventional methods of analysis and confirmed by UV, H-1 and C-13 NMR, mass spectra and acid hydrolysis to aglycone and sugar.