Using CC(C)(C)OC(=O)CC1c2ccccc2NC(=O)c2ccccc21, CCOC(=O)C(C)Br to produce CCOC(=O)CCN1C(=O)c2ccccc2C(CC(=O)OC(C)(C)C)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.