The molecule is an amino tetrasaccharide consisting of 2-acetamido-2-deoxy-beta-D-galactopyranosyl, alpha-D-galactopyranosyl, beta-D-galactopyranosyl, and beta-D-glucopyranose units joined together in sequence by (1->3), (1->4), and (1->4) glycosidic linkages, respectively. It is an amino tetrasaccharide and a galactosamine oligosaccharide.
N-[(2S,3R,4R,5R,6R)-2-[(2R,3R,4S,5S,6R)-2-[(2R,3R,4R,5R,6S)-4,5-dihydroxy-2-(hydroxymethyl)-6-[(2R,3S,4R,5R,6R)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide