Using [NH4+], O=C(Cl)c1cc(Oc2cc(F)c(C(F)(F)F)c(Cl)c2)ccc1Br to produce NC(=O)c1cc(Oc2cc(F)c(C(F)(F)F)c(Cl)c2)ccc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.