The molecule is an amino trisaccharide consisting of beta-D-glucopyranuronic acid, 2-acetamido-2-deoxy-alpha-D-glucopyranose and beta-D-glucopyranuronic acid residues joined in sequence by (1->4) glycosidic bonds. It is a glucosamine oligosaccharide, an amino trisaccharide and a member of acetamides.
(2S,3S,4S,5R,6R)-6-[(2R,3S,4R,5R,6R)-5-acetamido-6-[(2S,3S,4R,5R,6R)-2-carboxy-4,5,6-trihydroxyoxan-3-yl]oxy-4-hydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylic acid