Using CN(C)C=O, CC(Nc1c(/C=C/c2ccc(Br)cc2)c(=O)c1=O)C(C)(C)C to produce CC(Nc1c(/C=C/c2ccc(C#N)cc2)c(=O)c1=O)C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.