Uralsaponins M–Y, Antiviral Triterpenoid Saponins from the Roots of Glycyrrhiza uralensis

Thirteen new oleanane-type triterpenoid saponins, uralsaponins M–Y (1–13), and 15 known analogues (14–28) were isolated from the roots of Glycyrrhiza uralensis Fisch. The structures of 1–13 were identified on the basis of extensive NMR and MS data analyses. The sugar residues were identified by gas chromatography and ion chromatography coupled with pulsed amperometric detection after hydrolysis. Saponins containing a galacturonic acid (1–3) or...