The name/synonym for ligand F3S (curated from ChEBI, PubChem, and PDB databases):

1TRI-MU-SULFIDO-MU3-SULFIDO-TRIIRON
2[3FE-4S] CLUSTER
33FE-4S
4[FE3S4] CLUSTER
5FE3-S4 CLUSTER
6CUBOIDAL FE3S4 CLUSTER
7[FE3S4]