9-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-[[2-(4-nitrophenyl)ethoxy]carbonyl]-α-D-arabinofuranosyl]-6-[2-(4-nitrophenyl)ethoxy]-N-[[2-(4-nitrophenyl)ethoxy]carbonyl]-9H-purin-2-amine

9-[5-O-[(4-Methoxyphenyl)diphenylmethyl]-2-O-[[2-(4-nitrophenyl)ethoxy]carbonyl]-α-D-arabinofuranosyl]-6-[2-(4-nitrophenyl)ethoxy]-N-[[2-(4-nitrophenyl)ethoxy]carbonyl]-9H-purin-2-amine

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

6-[2-(4-Nitrophenyl)ethoxy]-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-2-amine

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

6-[2-(4-Nitrophenyl)ethoxy]-9-[3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-α-D-arabinofuranosyl]-9H-purin-2-amine

2-(4-Nitrophenyl)ethyl N-[9-α-D-arabinofuranosyl-6-[2-(4-nitrophenyl)ethoxy]-9H-purin-2-yl]carbamate

2-(4-Nitrophenyl)ethyl N-[6-[2-(4-nitrophenyl)ethoxy]-9-(2,3,5-tri-O-benzoyl-α-D-arabinofuranosyl)-9H-purin-2-yl]carbamate

6-[2-(4-Nitrophenyl)ethoxy]-9-(2,3,5-tri-O-benzoyl-α-D-arabinofuranosyl)-9H-purin-2-amine

6-[2-(4-Nitrophenyl)ethoxy]-9-(2,3,5-tri-O-acetyl-α-D-arabinofuranosyl)-9H-purin-2-amine

9-α-D-Arabinofuranosyl-6-[2-(4-nitrophenyl)ethoxy]-9H-purin-2-amine

N-[6-[2-(4-Nitrophenyl)ethoxy]-9-(2,3,5-tri-O-benzoyl-α-D-arabinofuranosyl)-9H-purin-2-yl]acetamide

N-[6-[2-(4-Nitrophenyl)ethoxy]-9-(2,3,5-tri-O-acetyl-α-D-arabinofuranosyl)-9H-purin-2-yl]acetamide

9-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-[[2-(4-nitrophenyl)ethoxy]carbonyl]-α-D-arabinofuranosyl]-N-[[2-(4-nitrophenyl)ethoxy]carbonyl]-9H-purin-6-amine

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-[[2-(4-nitrophenyl)ethoxy]carbonyl]-α-D-arabinofuranosyl]-4-[[[2-(4-nitrophenyl)ethoxy]carbonyl]amino]-2(1H)-pyrimidinone

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

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

9-[5-O-[(4-Methoxyphenyl)diphenylmethyl]-2-O-[[2-(4-nitrophenyl)ethoxy]carbonyl]-α-D-arabinofuranosyl]-N-[[2-(4-nitrophenyl)ethoxy]carbonyl]-9H-purin-6-amine

1-[5-O-[(4-Methoxyphenyl)diphenylmethyl]-2-O-[[2-(4-nitrophenyl)ethoxy]carbonyl]-α-D-arabinofuranosyl]-4-[[[2-(4-nitrophenyl)ethoxy]carbonyl]amino]-2(1H)-pyrimidinone

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