Using O=[N+]([O-])c1cc(Cl)ccc1Cl, COc1ccc(O)c(C=O)c1 to produce COc1ccc(Oc2ccc(Cl)cc2[N+](=O)[O-])c(C=O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.