Using O=C(O)c1ccc(Br)cc1[N+](=O)[O-], NCc1ccc(I)cc1F to produce O=C(NCc1ccc(I)cc1F)c1ccc(Br)cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.