Using CC(C)S(=O)(=O)Nc1ccc(C(=O)Cl)cc1, Nc1ccc(Br)cc1 to produce CC(C)S(=O)(=O)Nc1ccc(C(=O)Nc2ccc(Br)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.