Using CN(C)C=O, CC(C)(C)OC(=O)N1CCN(c2cccc(Br)c2)CC1 to produce CC(C)(C)OC(=O)N1CCN(c2cccc(C#N)c2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.