Using CN(Cc1ccc(Cl)cc1Cl)CC(O)c1cccc([N+](=O)[O-])c1 to produce CN1Cc2c(Cl)cc(Cl)cc2C(c2cccc([N+](=O)[O-])c2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.