Using COc1ccc(NC(c2ccc(Cl)cc2CN=[N+]=[N-])C(F)F)cc1 to produce COc1ccc(NC(c2ccc(Cl)cc2CN)C(F)F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.