Source:http://linkedlifedata.com/resource/umls/id/C0028621
MSH: Purine or pyrimidine bases attached to a ribose or deoxyribose. (From King & Stansfield, A Dictionary of Genetics, 4th ed),CSP: purine or pyrimidine bases attached to a ribose or deoxyribose.,NCI: Any of the glycosylamines consisting of either a purine or pyrimidine nucleobase, to a ribose or deoxyribose ring. Examples of these include cytidine, uridine, adenosine, guanosine, thymidine, inosine and others.