Using [Br-], CC(C)(C)OC(=O)N[C@H]1C=C[C@@H](COS(C)(=O)=O)C1 to produce CC(C)(C)OC(=O)N[C@@H]1C=C[C@H](CBr)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.