Abstract: Four oleanane-type compounds were isolated from EtOH extraction of Polygala crotalarioides Buch.Ham. They were cis-trans-isomers,can not be separated by us. According to the physical and chemical characteristics and spectral parameters,the structures of these compounds were identified as (E/Z)-PolygalasaponinXLIV (1), 3-O-β-D-glucopyranosyl presenegenin 28-O-β-D-galactopyranosyl-(1→4)-β-D-xylopyranosyl-(1→4)-α-L-rhamnopyranosyl-(1→2)-[6-O-acetyl-β-D-glucopyranosyl-(1→3)]-{4-O-[(E/Z)-3,4-dimethoxycinnamoyl]}-β-D-fucopyranosyl ester (2), (E/Z)-PolygalasaponinXXX(3), (E/Z)-senegasaponin C(4), respectively. It was the first time to report that these compounds were isolated from P. crotalarioides.

Key words: Polygala crotalarioides, chemical constituents, oleanane-type saponins