Using CSc1csc(-n2c(=O)[nH]c3ccccc32)n1, CC(C)(C)OC(=O)CBr to produce CSc1csc(-n2c(=O)n(CC(=O)OC(C)(C)C)c3ccccc32)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.