1-(3-O-benzyl-4-C-hydroxymethyl-β-D-erythro-pentofuranosyl)thymine

(1R,3R,4R,7S)-7-benzyloxy-1-hydroxymethyl-5-methyl-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane

(1R,3R,4R,7S)-7-benzyloxy-1-methanesulfonyloxymethyl-5-methyl-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane

(1R,3R,4R,7S)-7-benzyloxy-1-methanesulfonyloxymethyl-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane

1-[2-azido-3-O-benzyl-2-deoxy-5-O-methanesulfonyl-4-C-(methanesulfonyloxymethyl)-β-D-erythro-pentofuranosyl]thymine

1-(3-O-benzyl-5-O-methanesulfonyl-4-C-methanesulfonyloxymethyl-2-O-trifluoromethanesulfonyl-β-D-threo-pentofuranosyl)-thymine

2,2'-anhydro-1-(3-O-benzyl-5-O-methanesulfonyl-4-C-methanesulfonyloxymethyl-β-D-threo-pentofuranosyl)thymine

(1R,3R,4R,7S)-1-(4,4'-dimethoxytrityloxymethyl)-7-hydroxy-5-methyl-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane

(1R,3R,4R,7S)-1-(4,4'-dimethoxytrityloxymethyl)-7-hydroxy-5-N-methyl-3-(4-amino-5-methyl-cytosine-1-yl)-2-oxa-5-azabicyclo[2:2:1]heptane

(1R,3R,4R,7S)-7-hydroxy-1-hydroxymethyl-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane

Acetic acid (1R,3R,4R,7S)-1-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-5-methyl-3-(5-methyl-2-oxo-4-[1,2,4]triazol-1-yl-2H-pyrimidin-1-yl)-2-oxa-5-aza-bicyclo[2.2.1]hept-7-yl ester

(1R,3R,4R,7S)-(4,4'-dimethoxytrityloxymethyl)-7-hydroxy-5-methyl-3-(4-benzoyl-5-methylcytosin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane

(1R,3R,4R,7S)-7-benzyloxy-1-hydroxymethyl-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane