Using CC(=O)c1cc(C(C)=O)cc(C(C)(C)C)c1, Brc1ccccc1 to produce CC(=O)c1cc(C(C)(C)C)cc(C(C)(O)c2ccccc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.