Using COC(=O)C(F)(c1cc(Cl)ccc1OC)c1ccc(C(F)(F)F)cc1[N+](=O)[O-] to produce COc1ccc(Cl)cc1C(F)(C(=O)O)c1ccc(C(F)(F)F)cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.