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

1(R)-METHYLMALONYL-COA
23'-PHOSPHOADENOSINE 5'-{3-[(3R)-3-HYDROXY-2,2-DIMETHYL-4-({3-[(2-{[(2R)-2-METHYL-3-OXOPROPANOYL]SULFANYL}ETHYL)AMINO]-3-OXOPROPYL}AMINO)-4-OXOBUTYL] DIHYDROGEN DIPHOSPHATE}
3METHYLMALONYL-COENZYME A
4(R)-2-METHYL-3-OXOPROPANOYL-COA
5(R)-2-METHYL-3-OXOPROPIONYL-COA
6(R)-3-OXO-2-METHYLPROPANOYL-COA