Using COc1ccc(CNCc2cc(Cl)ccc2Br)cc1, O=C=NCc1ccccc1 to produce COc1ccc(CN2Cc3cc(Cl)ccc3N(Cc3ccccc3)C2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.