2-Amino-9-[2-deoxy-4-C-ethenyl-2-(fluoromethyl)-β-D-arabinofuranosyl]-1,9-dihydro-6H-purin-6-one

3',5'-Bis-O-[(1,1-dimethylethyl)dimethylsilyl]-4'-C-ethenyl-2'-O-methyluridine

4-Amino-1-[2-deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-4-C-ethenyl-2-methyl-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

1-[(2S,5R)-5-(4-Fluorophenyl)tetrahydro-5-(hydroxymethyl)-2-furanyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

3'-Deoxy-4'-C-(4-fluorophenyl)thymidine

4'-Ethyl5',6'-dimethyl1'-(diethylamino)-3'-oxospiro[cyclopropane-1,2'-[7]oxabicyclo[2.2.1]hept[5]ene]-4',5',6'-tricarboxylate

1-[4-C-(2-Chloroethenyl)-2-deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-2-methyl-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[(1R,5R,7R,8S)-8-Hydroxy-5-(hydroxymethyl)-6-oxabicyclo[3.2.1]oct-3-en-7-yl]-2,4(1H,3H)-pyrimidinedione

1-[(5R)-5-[[[(1,1-Dimethylethyl)dimethylsilyl]oxy]methyl]tetrahydro-5-phenyl-2-furanyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

5-Methyl-1-[(2S,5R)-tetrahydro-5-(hydroxymethyl)-5-[2-(phenylmethoxy)phenyl]-2-furanyl]-2,4(1H,3H)-pyrimidinedione

3'-Deoxy-4'-C-[2-(phenylmethoxy)phenyl]thymidine

Thymidine,3'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-4'-C-(1-methylethenyl)-

Thymidine,3'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-4'-C-(1-oxopropyl)-

1-[(1R,5R,7R,8S)-8-Hydroxy-5-(hydroxymethyl)-2-methyl-3-oxo-6-oxa-2-azabicyclo[3.2.1]oct-7-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(5R)-5-[[[(1,1-Dimethylethyl)dimethylsilyl]oxy]methyl]-5-(4-fluorophenyl)tetrahydro-2-furanyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

2'-O,4'-C-Ethenylidene-3',5'-O-(1-methylethylidene)uridine

1-[(1R,5R,7R,8S)-8-Hydroxy-5-(hydroxymethyl)-3-oxo-6-oxa-2-azabicyclo[3.2.1]oct-7-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

Thymidine,4'-C-acetyl-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-

1-[2,5-Anhydro-4-C-[2-(dimethoxyphosphinyl)ethenyl]-3-O-[(1,1-dimethylethyl)dimethylsilyl]-α-L-lyxofuranosyl]-2,4(1H,3H)-pyrimidinedione

Cytidine,N-benzoyl-2'-deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-4'-C-ethenyl-