Dm. Zhang et al., STUDIES ON THE CONSTITUENTS OF POLYGALA-JAPONICA HOUTT .2. STRUCTURESOF POLYGALASAPONINS XI-XIX, Chemical and Pharmaceutical Bulletin, 43(6), 1995, pp. 966-970
Nine new oleanane-type saponins polygalasaponins XI-XIX were isolated
from the aerial part of Polygala japonica. The structures of these com
pounds were established on basis of spectroscopic and chemical evidenc
e.