Using C[C@H]1SC(NC(=O)c2ccccc2)=N[C@@]2(c3ccc(F)cc3F)CO[C@@H](CO)C[C@@H]12, BrC(Br)(Br)Br to produce C[C@H]1SC(NC(=O)c2ccccc2)=N[C@@]2(c3ccc(F)cc3F)CO[C@@H](CBr)C[C@@H]12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.