Isolation and Structural Elucidation of Some Sapogenols from Abrus cantoniensis

Abstract

After hydrolysis of the saponin fraction of the roots of Abrus cantoniensis, a new triterpenoid sapogenol, cantoniensistriol, was isolated together with sophoradiol, soyasapogenol B and soyasapogenol A. The structures of cantoniensistriol and sophoradiol were elucidated by spectroscopic methods. On the basis of the relation between cantoniensistriol and soyasapogenol A, the steric assignment of the C-21 and C-22 hydroxyl groups of the latter was discussed.

Key Word Index

Abrus cantoniensis - Leguminosae - Cantoniensistiol - Olean-12-ene-3βe, 21βe, 22βa-triol - Sophoradiol - Olean-12-ene-3βe, 22βa-diol - Soyasapogenols A and B