Guanosine, N,N-bis[[2,2-bis(2-nitrophenyl)ethoxy]carbonyl]-2′-deoxy-

Guanosine, N-[[2,2-bis(2-nitrophenyl)ethoxy]carbonyl]-2′-deoxy-

Adenosine, N,N-bis[[2,2-bis(2-nitrophenyl)ethoxy]carbonyl]-2′-deoxy-

Adenosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-N-[[2,2-bis(2-nitrophenyl)ethoxy]carbonyl]-2′-deoxy-

Adenosine, N-[[2,2-bis(2-nitrophenyl)ethoxy]carbonyl]-2′-deoxy-

Adenosine, N-[[2,2-bis(2-nitrophenyl)ethoxy]carbonyl]-2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-

Adenosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-N-[[(4,5-dimethoxy-2-nitrophenyl)methoxy]carbonyl]-

2′-Deoxy-N-[[(4,5-dimethoxy-2-nitrophenyl)methoxy]carbonyl]adenosine

Adenosine, 2′-deoxy-N-[[(4,5-dimethoxy-2-nitrophenyl)methoxy]carbonyl]-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-N-[[2,2-bis(2-nitrophenyl)ethoxy]carbonyl]-2′-deoxy-

Cytidine, N-[[2,2-bis(2-nitrophenyl)ethoxy]carbonyl]-2′-deoxy-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-N-[[(4,5-dimethoxy-2-nitrophenyl)methoxy]carbonyl]-

2′-Deoxy-N-[[(4,5-dimethoxy-2-nitrophenyl)methoxy]carbonyl]cytidine

Thymidine, thymidylyl-(3′→5′)-2′-deoxy-5,6-dihydro-6-oxo-5-azauridylyl-(3′→5′)-

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-1,3,5-triazine-2,4,6(1H,3H,5H)-trione

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-α-D-erythro-pentofuranosyl]-1,3,5-triazine-2,4,6(1H,3H,5H)-trione

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-1,3,5-triazine-2,4,6(1H,3H,5H)-trione

1-(2-Deoxy-α-D-erythro-pentofuranosyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione

(2R,3R,3aR,4aR,9aS)-2,3,3a,4a,5,9a-Hexahydro-3-hydroxy-2-[(phosphonooxy)methyl]-6H-furo[2′,3′:4,5]oxazolo[3,2-a]pyridine-7-carboxamide

2′,3′-Dideoxy-5-[3-[[6-[[4-[[5-[(3aS,4S,6aR)-hexahydro-2-oxo-1H-thieno[3,4-d]imidazol-4-yl]-1-oxopentyl]amino]-1-oxobutyl]amino]-1-oxohexyl]amino]-1-propen-1-yl]uridine 5′-(tetrahydrogen triphosphate)