2-Amino-7-[2-deoxy-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-erythro-pentofuranosyl]-3,7-dihydro-5-iodo-4H-pyrrolo[2,3-d]pyrimidin-4-one

4H-Pyrrolo[2,3-d]pyrimidin-4-one, 2-amino-7-(2-deoxy-β-D-erythro-pentofuranosyl)-1,7-dihydro-5-(1-methylethyl)-

4H-Pyrrolo[2,3-d]pyrimidin-4-one, 2-amino-7-(2-deoxy-β-D-erythro-pentofuranosyl)-5-ethyl-1,7-dihydro-

4-Chloro-7-(2-deoxy-β-D-erythro-pentofuranosyl)-5-(1-methylethyl)-7H-pyrrolo[2,3-d]pyrimidin-2-amine

4-Chloro-7-(2-deoxy-β-D-erythro-pentofuranosyl)-5-ethyl-7H-pyrrolo[2,3-d]pyrimidin-2-amine

4-Chloro-7-[2-deoxy-3,5-bis-O-(4-methylbenzoyl)-β-D-erythro-pentofuranosyl]-5-(1-methylethyl)-7H-pyrrolo[2,3-d]pyrimidin-2-amine

4-Chloro-7-[2-deoxy-3,5-bis-O-(4-methylbenzoyl)-β-D-erythro-pentofuranosyl]-5-ethyl-7H-pyrrolo[2,3-d]pyrimidin-2-amine

4H-Pyrrolo[2,3-d]pyrimidin-4-one, 5-[(acetyloxy)methyl]-2-amino-7-(2-deoxy-β-D-erythro-pentofuranosyl)-1,7-dihydro-

4H-Pyrrolo[2,3-d]pyrimidin-4-one, 5-[(acetyloxy)methyl]-2-amino-7-[2-deoxy-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-erythro-pentofuranosyl]-1,7-dihydro-

4H-Pyrrolo[2,3-d]pyrimidin-4-one, 2-amino-7-[2-deoxy-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-erythro-pentofuranosyl]-1,7-dihydro-5-(hydroxymethyl)-

1H-Pyrrolo[2,3-d]pyrimidine-5-carboxylic acid, 2-amino-7-[2-deoxy-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-erythro-pentofuranosyl]-4,7-dihydro-4-oxo-, methyl ester

4H-Pyrrolo[2,3-d]pyrimidin-4-one, 2-amino-7-[2-deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-5-(1-hexynyl)-1,7-dihydro-

4H-Pyrrolo[2,3-d]pyrimidin-4-one, 2-amino-7-[2-deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-1,7-dihydro-5-(1-propynyl)-

4H-Pyrrolo[2,3-d]pyrimidin-4-one, 2-amino-7-[2-deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-1,7-dihydro-5-(1-methylethyl)-

4H-Pyrrolo[2,3-d]pyrimidin-4-one, 2-amino-7-[2-deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-5-ethyl-1,7-dihydro-

4H-Pyrrolo[2,3-d]pyrimidin-4-one, 2-amino-7-[2-deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-1,7-dihydro-5-(hydroxymethyl)-