Using O=C1N(c2ccc(OC(F)(F)F)cc2)C[C@@H]2C[C@H](O)CN12, BrC(Br)(Br)Br to produce O=C1N(c2ccc(OC(F)(F)F)cc2)C[C@@H]2C[C@@H](Br)CN12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.