Using CC(C)(C)C(=O)CBr, CCc1cc2c(=O)[nH]c(=O)n(Cc3ccc(-c4ccccc4C#N)cc3)c2s1 to produce CCc1cc2c(=O)n(CC(=O)C(C)(C)C)c(=O)n(Cc3ccc(-c4ccccc4C#N)cc3)c2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.