The molecule is an amino tetrasaccharide consisting of alpha-D-mannose, beta-D-mannose, N-acetyl-beta-D-glucosamine and N-acetyl-alpha-D-glucosamine joined together in sequence by (1->3), (1->4) and (1->4) glycosidic linkages. It derives from a N-acetyl-beta-D-glucosaminyl-(1->4)-N-acetyl-alpha-D-glucosamine.
N-[(2S,3R,4R,5S,6R)-5-[(2S,3R,4R,5S,6R)-3-acetamido-5-[(2S,3S,4S,5R,6R)-3,5-dihydroxy-6-(hydroxymethyl)-4-[(2R,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-4-hydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-2,4-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide