Using O=C(CCc1ccc(-c2ccccc2)cc1)OCc1ccccc1, CC(C)(C)OC(=O)CBr to produce CC(C)(C)OC(=O)CC(Cc1ccc(-c2ccccc2)cc1)C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.