The molecule is an amino disaccharide consisting of N-acetyl-beta-D-glucosamine, substituted on O-3 with a 1-carboxyethyl group and linked (1->4) to a second N-acetyl-beta-D-glucosamine residue. It is a glucosamine oligosaccharide and an amino disaccharide.
2-[(2S,3R,4R,5S,6R)-3-acetamido-2-[(2R,3S,4R,5R,6R)-5-acetamido-4,6-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxypropanoic acid