Using O=C(Cc1ccc(Br)cc1)OCc1ccccc1, C=CC(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)/C=C/c1ccc(CC(=O)OCc2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.