2-[2-[3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-2,3-dihydro-2-oxofuro[2,3-d]pyrimidin-6-yl]ethyl]-1H-isoindole-1,3(2H)-dione

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2'-deoxy-5-[5-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)-1-pentyn-1-yl]uridine

Uridine, 5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxy-5-[4-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)-1-butynyl]-

Uridine, 3'-C-(hydroxymethyl)-5-methyl-3',5'-bis-O-(phenylmethyl)-

1-[3-C-Ethenyl-3,5-bis-O-(phenylmethyl)-α-D-arabinofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[2-O-Acetyl-3-C-ethenyl-3,5-bis-O-(phenylmethyl)-α-D-arabinofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

Phosphoramidous acid, bis(1-methylethyl)-, (1R,2R,4S,5S)-2-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-4-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-3,6-dioxabicyclo[3.2.0]hept-1-yl 2-cyanoethyl ester

1-[(1R,2R,4S,5S)-2-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-1-hydroxy-3,6-dioxabicyclo[3.2.0]hept-4-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[2-O-Acetyl-3-C-[(benzoyloxy)methyl]-3,5-bis-O-(phenylmethyl)-α-D-arabinofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

5-Methyl-1-[(1R,2R,4S,5S)-1-(phenylmethoxy)-2-[(phenylmethoxy)methyl]-3,6-dioxabicyclo[3.2.0]hept-4-yl]-2,4(1H,3H)-pyrimidinedione

5-Methyl-1-[3-C-[[(methylsulfonyl)oxy]methyl]-3,5-bis-O-(phenylmethyl)-α-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[3-C-(Hydroxymethyl)-3,5-bis-O-(phenylmethyl)-α-D-arabinofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[2-O-Acetyl-3-C-[(acetyloxy)methyl]-3,5-bis-O-(phenylmethyl)-α-D-arabinofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(1R,2R,4S,5S)-1-Hydroxy-2-(hydroxymethyl)-3,6-dioxabicyclo[3.2.0]hept-4-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[2-Deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-5-methyl-1H-benzimidazole

1-[2-Deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-6-methyl-1H-benzimidazole

1-[2-Deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-6-methoxy-1H-benzimidazole

1-[2-Deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-5-methoxy-1H-benzimidazole

1-[2-Deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-5,6-dinitro-1H-benzimidazole

1-[2-Deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-7-(trifluoromethyl)-1H-benzimidazole