Using CC(=O)N(C)C, COC(=O)c1cc2c([nH]1)CCC2c1cccc(Br)c1 to produce COC(=O)c1cc2c([nH]1)CCC2c1cccc(C#N)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.