Using CCOC(=O)CCc1ccc(-c2ccc(-n3ccnc3)cc2)n1-c1ccc(C(N)=O)cc1C to produce CCOC(=O)CCc1ccc(-c2ccc(-n3ccnc3)cc2)n1-c1ccc(C#N)cc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.