Using NCc1cc(C(F)(F)F)cc(C(F)(F)F)c1, O=C(O)c1cc(Br)ccc1O to produce O=C(NCc1cc(C(F)(F)F)cc(C(F)(F)F)c1)c1cc(Br)ccc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.