Oleanane glycosides from Astragalus tauricolus: Isolation and structural elucidation based on a preliminary liquid chromatography-electrospray ionization tandem mass spectrometry profiling

► HPLC-ESIMSn profiling of the triterpene glycosides occurring in Astragalus tauricolus. ► By HPLC-ESIMSn, 22 oleanane-type triterpene glycosides were identified. ► Ten saponins never reported before were isolated from A. tauricolus whole plant. ► Cycloartane glycosides, the main Astragalus spp. constituents, were not found.