Phosphoramidous acid, bis(1-methylethyl)-, (1R,5R,7R,8S)-7-[4-(acetylamino)-2-oxo-1(2H)-pyrimidinyl]-5-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-3,6-dioxabicyclo[3.2.1]oct-8-yl 2-cyanoethyl ester

Phosphoramidous acid, bis(1-methylethyl)-, (1R,5R,7R,8S)-5-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-7-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-3,6-dioxabicyclo[3.2.1]oct-8-yl 2-cyanoethyl ester

N-[1-[(1R,5R,7R,8S)-5-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-8-hydroxy-3,6-dioxabicyclo[3.2.1]oct-7-yl]-1,2-dihydro-2-oxo-4-pyrimidinyl]acetamide

1-[(1R,5R,7R,8S)-5-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-8-hydroxy-3,6-dioxabicyclo[3.2.1]oct-7-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

N-[1,2-Dihydro-1-[(1R,5S,7R,8S)-8-hydroxy-5-(hydroxymethyl)-3,6-dioxabicyclo[3.2.1]oct-7-yl]-2-oxo-4-pyrimidinyl]acetamide

1-[(1R,5S,7R,8S)-8-Hydroxy-5-(hydroxymethyl)-3,6-dioxabicyclo[3.2.1]oct-7-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

N-[1-[(1R,5R,7R,8S)-5-[(Acetyloxy)methyl]-8-(phenylmethoxy)-3,6-dioxabicyclo[3.2.1]oct-7-yl]-1,2-dihydro-2-oxo-4-pyrimidinyl]acetamide

1-[(1R,5R,7R,8S)-5-[(Acetyloxy)methyl]-8-(phenylmethoxy)-3,6-dioxabicyclo[3.2.1]oct-7-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

5′-Cytidylic acid, 2′-deoxy-, anhydride with P,P′-(chlorofluoromethylene)bis[phosphonic acid] (1:1)

5′-Adenylic acid, 2′-deoxy-, anhydride with P,P′-(chloromethylene)bis[phosphonic acid] (1:1)