Cytidine, N-methyl-N-[[2-(4-nitrophenyl)ethoxy]carbonyl]-2′-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-

Cytidine, 3-methyl-N-[[2-(4-nitrophenyl)ethoxy]carbonyl]-2′-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-

3-[2-Deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino]methoxyphosphino]-2-O-2-propen-1-yl-β-D-ribofuranosyl]-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino]methoxyphosphino]-2-O-methyl-β-D-ribofuranosyl]-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino]methoxyphosphino]-β-D-ribofuranosyl]-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino]methoxyphosphino]-2-deoxy-2-fluoro-β-D-ribofuranosyl]-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino]methoxyphosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-O-2-propen-1-yl-β-D-ribofuranosyl]-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-O-methyl-β-D-ribofuranosyl]-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-β-D-ribofuranosyl]-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-2-fluoro-β-D-ribofuranosyl]-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-2-propen-1-yl-β-D-ribofuranosyl]-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-methyl-β-D-ribofuranosyl]-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-β-D-ribofuranosyl]-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-2-fluoro-β-D-ribofuranosyl]-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

1,3-Dihydro-6-methyl-3-(2-O-2-propen-1-yl-β-D-ribofuranosyl)-2H-pyrrolo[2,3-d]pyrimidin-2-one

1,3-Dihydro-6-methyl-3-(2-O-methyl-β-D-ribofuranosyl)-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-(2-Deoxy-2-fluoro-β-D-ribofuranosyl)-1,3-dihydro-6-methyl-2H-pyrrolo[2,3-d]pyrimidin-2-one