Using CC1(c2ccccc2)Cc2cc(O)c(Cl)c(Cl)c2C1=O, CC(C)(C)OC(=O)CBr to produce CC(C)(C)OC(=O)COc1cc2c(c(Cl)c1Cl)C(=O)C(C)(c1ccccc1)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.