3',5'-bis(O-pentafluorobenzyl)-O4-ethylthymidine

3',5'-di-O-acetyl-5-((5-hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)(3-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-yl)methyl)-2'-deoxy-β-L-uridine

Methanesulfonic acid (2S,3R,5S)-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-2-trityloxymethyl-tetrahydro-furan-3-yl ester

1-((2S,4S,5S)-4-Hydroxy-5-trityloxymethyl-tetrahydro-furan-2-yl)-5-methyl-1H-pyrimidine-2,4-dione

9-(3-azido-2,3-dideoxy-β-L-ribofuranosyl)-6-chloro-9H-purine