The condensation of two molecules of this substance forms a biuret. In the human body, this molecule undergoes a cycle which reacts ornithine and carbamoyl phosphate to form citrulline. A BUN test is 
The condensation of two molecules of this substance forms a biuret. In the human body, this molecule undergoes a cycle which reacts ornithine and carbamoyl phosphate to form citrulline. A BUN test is used to determine levels of this substance in the blood. The reaction of silver cyanate and ammonium chloride forms this product of the Wöhler synthesis. Ammonia and carbon dioxide are reacted to form this molecule in the Bosch-Meiser process. This organic molecule consists of two amines connected by a central carbonyl group. For 10 points, name this product of ammonia processing in humans, a molecule for which urine is named.
The condensation of two molecules of this substance forms a biuret.