Thermal decomposition of this compound is the first step in the reduction of NOX compounds by diesel exhaust fluid. A sulfur analog of this compound can test for the presence of transplatin in samples of the drug cisplatin in the Kurnakov test. A mixture of this compound and choline chloride was the first deep eutectic solvent. James Sumner proved enzymes were proteins by (*) crystallizing an enzyme that acts on this molecule. A radiolabeled (-5[1])variant of this compound is used to detect H. pylori bacteria. Asymmetric versions of this compound are produced by reacting primary amines with phosgene. The first artificial synthesis of an organic compound from inorganic materials was Friedrich Wohler’s (10[1])synthesis of this compound. For 10 points, name this nitrogenous compound secreted in urine. ■END■ (10[1])