Using Cc1nc2nc(C#N)cn2c(-c2ccc(Cl)cc2Cl)c1CNC(=O)OC(C)(C)C, [N-]=[N+]=[N-] to produce Cc1nc2nc(-c3nnn[nH]3)cn2c(-c2ccc(Cl)cc2Cl)c1CNC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.