Using O=[N+]([O-])c1ccc(Cl)c(S(=O)(=O)NCc2ccccc2)c1O to produce Nc1ccc(Cl)c(S(=O)(=O)NCc2ccccc2)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.