Using O=[N+]([O-])[O-], COc1ccc(C#N)c(OCC(F)(F)F)c1OC to produce COc1cc([N+](=O)[O-])c(C#N)c(OCC(F)(F)F)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.