Carbamic acid, [1-[2,3-dideoxy-5-O-[(1,1-dimethylethyl)dimethylsilyl]-3-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-α-D-erythro-pentofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]-, 2-(4-nitrophenyl)ethyl ester

4-Amino-1-[2,3-dideoxy-5-O-[(1,1-dimethylethyl)dimethylsilyl]-3-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-D-erythro-pentofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[(2R,3aR,8aS)-hexahydro-6-oxido-6-phenoxyfuro[2,3-e][1,3,2]dioxaphosphepin-2-yl]-2(1H)-pyrimidinone

Carbamic acid, [1,2-dihydro-1-[(2S,3aR,8aS)-hexahydro-6-oxido-6-phenoxyfuro[2,3-e][1,3,2]dioxaphosphepin-2-yl]-2-oxo-4-pyrimidinyl]-, 2-(4-nitrophenyl)ethyl ester

Cytidine, 2′,3′-dideoxy-5′-O-[(1,1-dimethylethyl)dimethylsilyl]-3′-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-N-[[2-(4-nitrophenyl)ethoxy]carbonyl]-

4-Amino-1-[2,3-dideoxy-5-O-[(1,1-dimethylethyl)dimethylsilyl]-3-[[(diphenoxyphosphinyl)oxy]methyl]-D-erythro-pentofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[3-[(benzoyloxy)methyl]-2,3-dideoxy-5-O-[(1,1-dimethylethyl)dimethylsilyl]-D-erythro-pentofuranosyl]-2(1H)-pyrimidinone

1-(5-Amino-2,5-dideoxy-3-O-ethyl-2-fluoro-β-D-arabinofuranosyl)-5-ethyl-2,4(1H,3H)-pyrimidinedione

1-[2,5-Dideoxy-2-fluoro-5-[(spiro[anthracene-9(10H),1′-cyclopropan]-10-ylcarbonyl)amino]-β-D-arabinofuranosyl]-5-ethyl-2,4(1H,3H)-pyrimidinedione

1-[2,5-Dideoxy-5-[[[9,10-dihydro-10,10-bis(trifluoromethyl)-9-anthracenyl]carbonyl]amino]-2-fluoro-β-D-arabinofuranosyl]-5-ethyl-2,4(1H,3H)-pyrimidinedione

1-[2,5-Dideoxy-5-[[(9,10-dihydro-10,10-dimethyl-9-anthracenyl)carbonyl]amino]-2-fluoro-β-D-arabinofuranosyl]-5-ethyl-2,4(1H,3H)-pyrimidinedione

2,4(1H,3H)-Pyrimidinedione, 1-[2,5-dideoxy-5-[[(9,10-dihydro-9,9-dimethyl-9-silaanthracen-10-yl)carbonyl]amino]-2-fluoro-β-D-arabinofuranosyl]-5-ethyl-

1-[2,5-Dideoxy-5-[[(4,5-dichloro-9H-xanthen-9-yl)carbonyl]amino]-2-fluoro-β-D-arabinofuranosyl]-5-ethyl-2,4(1H,3H)-pyrimidinedione

1-[2,5-Dideoxy-2-fluoro-5-[[(4-methoxy-9H-xanthen-9-yl)carbonyl]methylamino]-β-D-arabinofuranosyl]-5-ethyl-2,4(1H,3H)-pyrimidinedione

1-[2,5-Dideoxy-5-[[(10,10-dioxido-9H-thioxanthen-9-yl)carbonyl]amino]-2-fluoro-β-L-arabinofuranosyl]-5-ethyl-2,4(1H,3H)-pyrimidinedione

1-[2,5-Dideoxy-2-fluoro-5-[(9H-thioxanthen-9-ylcarbonyl)amino]-β-L-arabinofuranosyl]-5-ethyl-2,4(1H,3H)-pyrimidinedione

1-[2,5-Dideoxy-5-[[(2,7-dichloro-9H-xanthen-9-yl)carbonyl]amino]-2-fluoro-β-L-arabinofuranosyl]-5-ethyl-2,4(1H,3H)-pyrimidinedione

1-[2,5-Dideoxy-2-fluoro-5-[(9H-xanthen-9-ylcarbonyl)amino]-β-L-arabinofuranosyl]-5-ethyl-2,4(1H,3H)-pyrimidinedione

1-(5-Amino-2,5-dideoxy-2-fluoro-β-L-arabinofuranosyl)-5-ethyl-2,4(1H,3H)-pyrimidinedione

1-[2,5-Dideoxy-5-[[(10,10-dioxido-9H-thioxanthen-9-yl)carbonyl]amino]-2-fluoro-β-D-arabinofuranosyl]-5-iodo-2,4(1H,3H)-pyrimidinedione