4-hydroxy-3-(2',3'-O-isopropylidene-5'-O-trityl-β-D-ribofuranosyl)pyrazole-5-carboxamide

2',3',5'-tri-O-acetylpyrazofurin

methyl 4-((3aS,6R,6aR)-2,2-dimethyl-6-((trityloxy)methyl)tetrahydrofuro[3,4-d][1,3]dioxol-4-yl)-3-oxobutanoate

4-hydroxy-5-(O2,O3-isopropylidene-α-D-ribofuranosyl)-1(2)H-pyrazole-3-carboxylic acid ethyl ester

5-[O2,O3-isopropylidene-O5-(4-nitro-benzoyl)-α-D-ribofuranosyl]-4-oxo-4,5-dihydro-1H-pyrazole-3,5-dicarboxylic acid diethyl ester