Using CC(C)(C)C(=O)CBr, CCCOc1cc(=O)[nH]c(=O)n1Cc1ccc(-c2ccccc2C#N)cc1 to produce CCCOc1cc(=O)n(CC(=O)C(C)(C)C)c(=O)n1Cc1ccc(-c2ccccc2C#N)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.