Using O=C([O-])C1=C(Cl)CC2CC(=O)N12, CC(C)(C)c1ccc(CBr)cc1 to produce CC(C)(C)c1ccc(COC(=O)C2=C(Cl)CC3CC(=O)N23)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.