5-(5-O-t-butyldimethylsilyl-2,3-O-isopropylidene-β-D-ribofuranosyl)-1H-tetrazole

5-<3,5-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)-β-D-ribofuranosyl>-1H-tetrazole

2-phenyloxy-5-(5-O-benzoyl-2,3-O-isopropylidene-β-D-ribofuranosyl)-1,3,4-oxadiazole

2-methyl-5-(β-D-ribofuranosyl)-1,3,4-oxadiazole