Using CN1C(Cl)=Nc2ccc(Cl)cc2C1c1ccccc1, [N-]=[N+]=[N-] to produce CN1c2nnnn2-c2ccc(Cl)cc2C1c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.