Using CC(=CCc1c(C)nc(N)nc1Cl)c1cc(Cl)ccc1Cl, [N-]=[N+]=[N-] to produce CC(=CCc1c(C)nc(N)n2nnnc12)c1cc(Cl)ccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.