Oleanane-type triterpenoid saponins from the roots of Polygala aureocauda Dunn.

Polygala aureocauda Dunn. (Polygalaceae) has been widely used in Vietnamese traditional medicine for the treatment of hepatitis, nephritis, sonasthenia, anaemia, back pain, and knee fatigue. Chemical investigation of a methanol extract of P. aureocauda roots resulted in the isolation of four new oleanane triterpenoid saponins (polyaureosides A–D) and two known ones (polygalasaponin XLVIII and arilloside A). Their structures were elucidated by...