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

1N-ACETYL-L-GLUTAMATE(2-)
2ACETYL-L-GLUTAMATE
3NAG
4(2S)-2-ACETAMIDOPENTANEDIOATE
5N-ACETYL-L-GLUTAMATE
6(S)-2-(ACETYLAMINO)PENTANEDIOATE
72-(ACETYLAMINO)-2-DEOXY-A-D-GLUCOPYRANOSE