(+)-N4-benzoyl-1-[(1R,2R,4S)-5-O-(tert-butyldiphenylsilyl)-2,3-dideoxy-2-fluoro-2-phenylselenyl-4-thio-β-D-ribofuranosyl]-5-fluorocytosine

4-(acetylsulfanyl)-5-(tert-butyldiphenylsilyloxy)-2-fluoropentanoic acid methyl ester

N-(2-((1-trimethylsilyl)oxy)pyrimidin-4-yl)benzamide

(2S,4S)-(+)-4-tert-butyldiphenylsilyloxymethyl-2-fluoro-γ-butyrolactone