Using O=C([O-])[O-], CC(C)(C)OC(=O)NC(Cc1ccc(Br)cc1)C(=O)OCc1ccccc1 to produce CC(C)(C)OC(=O)NC(Cc1ccc(-c2cccc(C=O)c2)cc1)C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.