Using Oc1ccc(Cl)cc1Cl, Nc1cc(Cl)c(Cl)cc1[N+](=O)[O-] to produce Nc1cc(Oc2ccc(Cl)cc2Cl)c(Cl)cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.