The name/synonym for ligand UD1 (curated from ChEBI, PubChem, and PDB databases):

1UDP-N-ACETYLGLUCOSAMINE
2UDP-N-ACETYL-D-GLUCOSAMINE
3UDP-GLCNAC
4URIDINE-DIPHOSPHATE-N-ACETYLGLUCOSAMINE
5UDP-ACETYL-D-GLUCOSAMINE