A mixture of deionized water and this compound makes up commercial diesel exhaust fluid. A side product of the Bosch–Meiser process for producing this compound is biuret (“bye-yur-ET”), which is toxic to plants when used in fertilizers like UAN. Radiolabeled variants of this compound can detect Helicobacter pylori, which hydrolyzes (10[1])it to increase stomach pH. Variations of this compound can be synthesized by reacting phosgene (-5[1])with primary amines. (-5[1])Ornithine and this compound are generated from ammonia in the body (10[1])in this compound’s namesake cycle. (10[2])Friedrich Wöhler disproved vitalism by making this compound the first (10[1])organic compound to be synthesized from inorganic starting materials. For 10 points, name this nitrogen-containing compound excreted in urine. (10[1])■END■ (10[2])