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

1METHICILLIN
26BETA-(2,6-DIMETHOXYBENZAMIDO)-2,2-DIMETHYLPENAM-3ALPHA-CARBOXYLIC ACID
3(2S,5R,6R)-6-[(2,6-DIMETHOXYBENZOYL)AMINO]-3,3-DIMETHYL-7-OXO-4-THIA-1-AZABICYCLO[3.2.0]HEPTANE-2-CARBOXYLIC ACID
46BETA-(2,6-DIMETHOXYBENZAMIDO)PENICILLANIC ACID