Source:http://linkedlifedata.com/resource/umls/id/C0018330
MSH: A purine nucleoside that has guanine linked by its N9 nitrogen to the C1 carbon of ribose. It is a component of ribonucleic acid and its nucleotides play important roles in metabolism. (From Dorland, 28th ed),CSP: purine nucleoside that has guanine linked by its N9 nitrogen to the C1 carbon of ribose; a component of ribonucleic acid; its nucleotides play important roles in metabolism.,NCI: A purine nucleoside formed from a beta-N9-glycosidic bond between guanine and a ribose ring and is essential for metabolism.