Using COC(=O)c1ccc(CC(C(=O)OCc2ccccc2)c2ccc(Br)cc2)cc1 to produce COC(=O)c1ccc(CC(C(=O)O)c2ccc(Br)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.