Using COC(=O)c1cc(C)c2c(c1)S(=O)(=O)Cc1cccc(Cl)c1N2, O=[N+]([O-])O to produce COC(=O)c1cc(C)c2c(c1)S(=O)(=O)Cc1cc([N+](=O)[O-])cc(Cl)c1N2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.