in this study , oligosaccharides containing more than one repeating unit were isolated from a lipopolysaccharide of a group b salmonella , and the anomeric configuration of the rhamnosyl residues was determined by the comparison of optical rotatory powers of these oligosaccharides with that of the repeating unit trisaccharide .
C0028959
oligosaccharides
C0041102
trisaccharide