1-[5-O-[(4-Methoxyphenyl)diphenylmethyl]-2-O-[[2-(4-nitrophenyl)ethoxy]carbonyl]-α-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

N-[[2-(4-Nitrophenyl)ethoxy]carbonyl]-9-[2-O-[[2-(4-nitrophenyl)ethoxy]carbonyl]-α-D-arabinofuranosyl]-9H-purin-6-amine

4-[[[2-(4-Nitrophenyl)ethoxy]carbonyl]amino]-1-[2-O-[[2-(4-nitrophenyl)ethoxy]carbonyl]-α-D-arabinofuranosyl]-2(1H)-pyrimidinone

5-Methyl-1-[2-O-[[2-(4-nitrophenyl)ethoxy]carbonyl]-α-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[2-O-[[2-(4-Nitrophenyl)ethoxy]carbonyl]-α-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

2-(4-Nitrophenyl)ethyl N-[9-[2-O-[[2-(4-nitrophenyl)ethoxy]carbonyl]-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-α-D-arabinofuranosyl]-9H-purin-6-yl]carbamate

2-(4-Nitrophenyl)ethyl N-[1,2-dihydro-1-[2-O-[[2-(4-nitrophenyl)ethoxy]carbonyl]-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-α-D-arabinofuranosyl]-2-oxo-4-pyrimidinyl]carbamate

5-Methyl-1-[2-O-[[2-(4-nitrophenyl)ethoxy]carbonyl]-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-α-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[2-O-[[2-(4-Nitrophenyl)ethoxy]carbonyl]-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-α-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

4-Amino-1-[3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-α-D-arabinofuranosyl]-2(1H)-pyrimidinone

1-[3,5-O-[1,1,3,3-Tetrakis(1-methylethyl)-1,3-disiloxanediyl]-α-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

N-[6-[[(Diphenylamino)carbonyl]oxy]-9-(2,3,5-tri-O-benzoyl-α-D-ribofuranosyl)-9H-purin-2-yl]acetamide

N-[6-[[(Diphenylamino)carbonyl]oxy]-9-(2,3,5-tri-O-acetyl-α-D-ribofuranosyl)-9H-purin-2-yl]acetamide

N-[1,2-Dihydro-2-oxo-1-(2,3,5-tri-O-acetyl-α-D-arabinofuranosyl)-4-pyrimidinyl]acetamide

1-(2,3,5-Tri-O-acetyl-α-D-arabinofuranosyl)-2,4(1H,3H)-pyrimidinedione

3′-O-[Bis(4-methoxyphenyl)phenylmethyl]-5′-deoxy-4′-C-[[hydroxy[(4-methoxy-1-oxido-2-pyridinyl)methoxy]phosphinyl]methoxy]thymidine

1-[3-O-[Bis(4-methoxyphenyl)phenylmethyl]-2,5-dideoxy-4-C-[[hydroxy[(4-methoxy-1-oxido-2-pyridinyl)methoxy]phosphinyl]methoxy]-α-L-threo-pentofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[2,5-Dideoxy-4-C-[[hydroxy[(4-methoxy-1-oxido-2-pyridinyl)methoxy]phosphinyl]methoxy]-α-L-threo-pentofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[2,5-Dideoxy-3-O-[(1,1-dimethylethyl)dimethylsilyl]-4-C-[[hydroxy[(4-methoxy-1-oxido-2-pyridinyl)methoxy]phosphinyl]methoxy]-α-L-threo-pentofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[2,5-Dideoxy-3-O-[(1,1-dimethylethyl)dimethylsilyl]-4-C-[[methoxy[(4-methoxy-1-oxido-2-pyridinyl)methoxy]phosphinyl]methoxy]-α-L-threo-pentofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione