3,4-Seco-lupane type triterpene glycosyl esters from a Korean medicinal plant, Acanthopanax chiisanensis (Araliaceae).

The experimental details of the isolation and structural determination of chiisanoside (1), a new 3, 4-seco-lupane type triterpene glycosyl ester, from leaves and stem bark of Acanthopanax chiisanensis are described. From leaves of this plant, two homologous glycosyl esters, named isochiisanoside and its methyl ester (2 and 3), were also isolated. Their structures were elucidated on the basis of chemical and spectral data and confirmed by the derivation of these compound from 1.