Uracil is an organic base, one of the four main bases in RNA, a major pyrimidine component in RNA, and also a component of various uridine acids. The triphosphate compound of uridine is urine triphosphate, which is the precursor of uracil in the process of ribonucleic acid biosynthesis. Urine triphosphate as coenzyme participates in the synthesis of some sugar biochemical books.