The molecule is a branched amino tetrasaccharide consisting of D-galactose at the reducing end with an alpha-L-fucosyl-(1->4)-[beta-D-galactosyl-(1->3)]-N-acetyl-beta-D-glucosaminyl moiety attached at the 3-position. It is an amino tetrasaccharide and a glucosamine oligosaccharide.
N-[(2S,3R,4R,5S,6R)-6-(hydroxymethyl)-4-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-2-[(3R,4S,5S,6R)-2,3,5-trihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-5-[(2S,3S,4R,5S,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-3-yl]acetamide