The molecule is a linear trisaccharide consisting of alpha-KDN, beta-D-galactose and D-glucosamine residues linked sequentially (2->3) and (1->4). It has a role as an epitope.
(2S,4S,5R,6R)-2-[(2R,3S,4S,5R,6S)-3,5-dihydroxy-2-(hydroxymethyl)-6-[(2R,3S,4R,5R)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxan-4-yl]oxy-4,5-dihydroxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxane-2-carboxylic acid