Using CC(=O)Nc1ccn(CCCCl)c(=O)n1, [N-]=[N+]=[N-] to produce CC(=O)Nc1ccn(CCCN=[N+]=[N-])c(=O)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.