Dm. Zhang et al., STUDIES ON THE CONSTITUENTS OF POLYGALA-JAPONICA HOUTT .3. STRUCTURESOF POLYGALASAPONINS XX-XXVII, Chemical and Pharmaceutical Bulletin, 44(1), 1996, pp. 173-179
Eight new oleanane-type saponins, polygalasaponins XX--XXVII, along wi
th a known saponin, hederagenin 3-O-beta-D-glucopyranosyl (1 --> 2)-be
ta-D-glucopyranoside, were isolated from the aerial part of Polygala j
aponica. The structures of these compounds were established on the bas
is of spectroscopic and chemical evidence.