Methyl 4,6-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-dily)-α-D-glucopyranoside

2',3'-O-isopropylidenepyrazofurin

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

2-benzyl-4-hydroxy-5-β-D-ribofuranosyl-2H-pyrazole-3-carboxylic acid methyl ester