Uridine

Uracil is an organic base that was first isolated and synthesized in 1901. When this member of the pyrimidine family is combined with a ribose ring via a glycosidic bond, a nucleoside called uridine is formed, which can be phosphorylated to produce one of three nucleotides: uridine monophosphate (UMP), uridine diphosphate (UDP), and uridine triphosphate (UTP).