Using COC(=O)CC(c1ccccc1)c1ccc(C(=O)C(C)C)cc1, BrBr to produce COC(=O)CC(c1ccccc1)c1ccc(C(=O)C(C)(C)Br)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.