The name/synonym for ligand NAG (curated from ChEBI, PubChem, and PDB databases):

1ALDEHYDO-N-ACETYL-D-GLUCOSAMINE
2N-ACETYLGLUCOSAMINE
3D-GLCNAC
42-ACETAMIDO-2-DEOXY-D-GLUCOSE
5N-ACETYLCHITOSAMINE
6N-ACETYL-D-GLUCOSAMINE
76-DEOXY-BETA-L-GALACTOSE