Using CSc1cc(Cl)c(O)cc1Cl, O=[N+]([O-])c1cc(Cl)nc(Cl)c1 to produce CSc1cc(Cl)c(Oc2cc(Cl)nc(Cl)c2)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.