Using O=C([O-])[O-], O=C(c1c(Cl)cccc1C(F)(F)F)n1nc(Br)c2ccccc21 to produce O=C1OCc2cc(-c3nn(C(=O)c4c(Cl)cccc4C(F)(F)F)c4ccccc34)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.