Using CN(C)C=O, COc1cc2c(c(Cl)c1Cl)C(=O)C(C)(c1ccc(Br)cc1)C2 to produce COc1cc2c(c(Cl)c1Cl)C(=O)C(C)(c1ccc(C#N)cc1)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.