Typically, a furanoside sugar such as ribose or deoxyribose is used. The sugar is attached to the base through a glycosidic bond.
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1-<2-bromo-2,3-dideoxy-5-O-(4-methylbenzoyl)-D-erythro-pentofuranosyl>uracil
allyl-3-O-allyl-4,6-O-benzylidene-α-D-glucopyranoside
3-N-benzoyl-1-β-(3'-chloro-2',3'-dideoxy-5'-O-tritylxylofuranosyl)thymine
3-O-benzoyloxy-5-deoxy-1,2-O-isopropylidene-α-D-ribohexofuranose
