Using O=[N+]([O-])c1ccc(-c2ccc(Cl)cc2)cc1, ClC(Cl)Cl to produce O=[N+]([O-])c1ccc(-c2ccc(Cl)cc2)cc1C(Cl)Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.