The molecule is a linear amino tetrasaccharide consisting of N-acetyl-alpha-neuraminyl, beta-D-galactosyl, N-acetyl-beta-D-glucosaminyl and beta-D-mannose residues linked sequentially (2->3), (1->4) and (1->2). It is an amino tetrasaccharide and a glucosamine oligosaccharide.
(2S,4S,5R,6R)-5-acetamido-2-[(2S,3R,4S,5S,6R)-2-[(2R,3S,4R,5R,6S)-5-acetamido-4-hydroxy-2-(hydroxymethyl)-6-[(2S,3S,4S,5S,6R)-2,4,5-trihydroxy-6-(hydroxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4-hydroxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxane-2-carboxylic acid