Using COCCO, O=[N+]([O-])c1cc2c(Nc3ccc(F)c(Cl)c3)ncnc2cc1F to produce COCCOc1cc2ncnc(Nc3ccc(F)c(Cl)c3)c2cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.