Using COc1cc2c(cc1-c1ccc(Cl)cc1)CCC(=O)N2, CC(C)(C)OC(=O)CBr to produce COc1cc2c(cc1-c1ccc(Cl)cc1)CCC(=O)N2CC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.