Using Cn1c(Nc2cc(Cl)cc(Cl)c2)nc2ccccc21, COC(=O)c1ccc(CBr)cc1 to produce COC(=O)c1ccc(CN(c2cc(Cl)cc(Cl)c2)c2nc3ccccc3n2C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.