4)-N-acetyl-D-glucosamine

ChEBI: Alpha-D-Gal-(1->4)-beta-D-Gal-(1->4)-D-GlcNAc is an amino trisaccharide consisting of two D-galactose residues and an N-acetyl-D-glucosamine residue (at the reducing end) in a linear sequence. It is an amino trisaccharide and a glucosamine oligosaccharide.