Using CC1=C(C(=O)O)N2C(=O)C(NC(=O)C(N)c3ccc(O)c(CCl)c3)C2SC1, [N-]=[N+]=[N-] to produce CC1=C(C(=O)O)N2C(=O)C(NC(=O)C(N)c3ccc(O)c(CN=[N+]=[N-])c3)C2SC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.