Using [N-]=[N+]=[N-], Cc1c(C#N)nn(-c2ccc(Cl)cc2Cl)c1-c1ccc(Cl)cc1 to produce Cc1c(-c2nnn[nH]2)nn(-c2ccc(Cl)cc2Cl)c1-c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.