The molecule is a disaccharide composed of two 2-(acetylamino)-2-deoxy-D-galactopyranose units in (1->3) linkage. It is an amino disaccharide and a galactosamine oligosaccharide.
N-[(3R,4R,5R,6R)-2-[(3R,4R,5R,6R)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide