4'-C-Azido-4-thiouridine

1-(4-C-Azido-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-4-(methoxymethylamino)-2(1H)-pyrimidinone

1-(4-C-Azido-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-4-(diethylamino)-2(1H)-pyrimidinone

4'-C-Azido-2-thiouridine

1-(4-C-Azido-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-4-(dimethylamino)-2(1H)-pyrimidinone

1-[(4R,5R,7R,8R)-7-Azido-8-hydroxy-7-(hydroxymethyl)-6-oxa-1-thiaspiro[3.4]oct-5-yl]-2,4(1H,3H)-pyrimidinedione

1-(4-C-Azido-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-4-(ethylamino)-2(1H)-pyrimidinone

1-(4-C-Azido-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-5-fluoro-2,4(1H,3H)-pyrimidinedione

1-(4-C-Azido-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-4-(hydroxyamino)-2(1H)-pyrimidinone

9-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-1H-purin-6(9H)-one

1-(4-C-Azido-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-4-[(2-hydroxyethyl)amino]-2(1H)-pyrimidinone

1-(4-C-Azido-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-4-(4-morpholinyl)-2(1H)-pyrimidinone

Uridine,4'-C-azido-2'-deoxy-,3',5'-diacetate

1-(4-C-Azido-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-4-(methoxyamino)-2(1H)-pyrimidinone

1-(4-C-Azido-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-4-(1-pyrrolidinyl)-2(1H)-pyrimidinone

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

1-(4-C-Azido-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-4-[(3-hydroxypropyl)amino]-2(1H)-pyrimidinone

4-Amino-1-[4-C-azido-2-deoxy-2-methyl-3-O-(2-methyl-1-oxopropyl)-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

1-(4-C-Azido-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-4-(cyclopentylamino)-2(1H)-pyrimidinone

1-(4-C-Azido-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-4-(ethoxyamino)-2(1H)-pyrimidinone