Using CCc1ccc2nc(C)[nH]c2c1N1CC(CN=[N+]=[N-])OC1=O to produce CCc1ccc2nc(C)[nH]c2c1N1CC(CN)OC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.