Using COC(=O)c1cc(-c2nc(-c3ccc(F)c(Cl)c3)cs2)ccc1-c1ccccc1[N+](=O)[O-] to produce O=C(O)c1cc(-c2nc(-c3ccc(F)c(Cl)c3)cs2)ccc1-c1ccccc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.