Source:http://linkedlifedata.com/resource/umls/id/C0041986
MSH: A uracil nucleotide containing a pyrophosphate group esterified to C5 of the sugar moiety.,CSP: nucleotide, the 5'-pyrophosphate of uridine, which serves as a carrier for hexose, hexosamines and hexuronic acids in the sythesis of glycogen, glycoproteins and glycosaminoglycans.