Using CN(C)C=O, COC(=O)C(OC(C)(C)C)c1c(-c2ccc(C)c(C)c2)c2ccc(Br)cc2c(=O)n1C to produce COC(=O)C(OC(C)(C)C)c1c(-c2ccc(C)c(C)c2)c2ccc(C#N)cc2c(=O)n1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.