Using COC(=O)CCc1ccc(N2CCN(c3cccc(N)c3)C2=O)cc1, N#CN to produce COC(=O)CCc1ccc(N2CCN(c3cccc(NC(=N)N)c3)C2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.