Using O=[N+]([O-])c1cccc(Cl)c1Cl, Sc1ccc(Cl)cc1Cl to produce O=[N+]([O-])c1cccc(Cl)c1Sc1ccc(Cl)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.