Using CC(C)(C)OC(=O)CBr, O=C(OCc1ccccc1)c1cccc(O)c1 to produce CC(C)(C)OC(=O)COc1cccc(C(=O)O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.