Oligosaccharide polyester and triterpenoid saponins from the roots of Polygala japonica

An oligosaccharide polyester (1) and four triterpenoid saponins (2-5) along with five known compounds were isolated from the roots of Polygala japonica. Their structures were determined by 1D and 2D NMR spectroscopy, chemical methods and by comparison with data reported in the literature.