The name/synonym for ligand MU2 (curated from ChEBI, PubChem, and PDB databases):

1MURAMYL DIPEPTIDE
2MDP
3N-ACETYLMURAMYL-L-ALANYL-D-ISOGLUTAMINE
4MURNAC-L-ALA-GAMMA-D-GLU
5ACETYLMURAMYL-ALANYL-ISOGLUTAMINE
6ACETYLMURAMYL-L-ALANYL-D-ISOGLUTAMINE
7N2-(N-(N-ACETYLMURAMOYL)-L-ALANYL)-D-ALPHA-GLUTAMINE