Using O=[N+]([O-])c1ccc(C(c2ccc(Cl)cc2)c2nccs2)cc1 to produce Nc1ccc(C(c2ccc(Cl)cc2)c2nccs2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.