6-(2-Nitrophenyl)-9-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-9H-purine

2,4(1H,3H)-Pyrimidinedione, 1-[(5ξ,7ξ,8ξ)-5,8-anhydro-2,6,7,9-tetradeoxy-10-O-[(1,1-dimethylethyl)dimethylsilyl]-3-O-[(1,1-dimethylethyl)diphenylsilyl]-7-(trimethylsilyl)-β-D-erythro-decofuranosyl]-5-methyl-

1-[(2R,3S,5R)-5′-(2-Bromoethyl)-3-[[(1,1-dimethylethyl)diphenylsilyl]oxy]octahydro-4′-(trimethylsilyl)[2,2′-bifuran]-5-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

2,4(1H,3H)-Pyrimidinedione, 1-[(5ξ,7ξ,8ξ)-5,8-anhydro-2,6,7,9-tetradeoxy-3-O-[(1,1-dimethylethyl)diphenylsilyl]-7-(trimethylsilyl)-β-D-erythro-decofuranosyl]-5-methyl-

2,4(1H,3H)-Pyrimidinedione, 1-[(5ξ,7ξ,8ξ)-7,10-anhydro-2,6,8,9-tetradeoxy-3-O-[(1,1-dimethylethyl)diphenylsilyl]-8-(trimethylsilyl)-β-D-erythro-decofuranosyl]-5-methyl-

1,7-Dioxa-2-phosphaspiro[4.4]non-3-ene-3-carboxylic acid, 4-amino-8-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2-ethoxy-, ethyl ester, 2-oxide, (2S,5R,6R,8R,9R)-

1,7-Dioxa-2-phosphaspiro[4.4]non-3-ene-3-carboxylic acid, 4-amino-8-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2-ethoxy-9-hydroxy-, ethyl ester, 2-oxide, (2S,5S,6R,8R,9R)-

1,7-Dioxa-2-phosphaspiro[4.4]non-3-ene-3-carboxylic acid, 4-amino-8-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-2-ethoxy-9-hydroxy-6-(hydroxymethyl)-, ethyl ester, 2-oxide, (2S,5S,6R,8R,9R)-

1,7-Dioxa-2-phosphaspiro[4.4]non-3-ene-3-carboxylic acid, 4-amino-8-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2-ethoxy-, ethyl ester, 2-oxide, (2R,5R,6R,8R,9R)-

1,7-Dioxa-2-phosphaspiro[4.4]non-3-ene-3-carboxylic acid, 4-amino-8-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2-ethoxy-9-hydroxy-, ethyl ester, 2-oxide, (2R,5S,6R,8R,9R)-

1,7-Dioxa-2-phosphaspiro[4.4]non-3-ene-3-carboxylic acid, 4-amino-8-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-2-ethoxy-9-hydroxy-6-(hydroxymethyl)-, ethyl ester, 2-oxide, (2R,5S,6R,8R,9R)-

1,7-Dioxa-2-phosphaspiro[4.4]non-3-ene-3-carboxylic acid, 9-(acetyloxy)-4-amino-6-[(benzoyloxy)methyl]-8-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-2-ethoxy-, ethyl ester, 2-oxide, (2S,5R,6R,8R,9R)-