Uridine 5'-monophosphate (Standard) is the standard substance of Uridine 5'-monophosphate, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. 5'-Uridylic acid. A uracil nucleotide containing one phosphate group esterified to the sugar moiety in the 2', 3' or 5' position. Uridine 5'-monophosphate (Uridylic acid) is a nucleotide that is found in RNA. It is an ester of phosphoric acid with the nucleoside uridine. UMP consists of the phosphate group, the pentose sugar ribose, and the nucleobase uracil.