Using O=C(CBr)CC(=O)NC1C(=O)N2C(C(=O)O)=CCS[C@H]12, NC(N)=S to produce Nc1nc(CC(=O)NC2C(=O)N3C(C(=O)O)=CCS[C@H]23)cs1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.