Using Nc1cc([C@@H]2CNC(=O)C2)ccc1Cl, O=C1CCC(=O)N1Br to produce Nc1cc([C@@H]2CNC(=O)C2)c(Br)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.