Guanosine, 2'-C-methyl-, 5'-[2-[[2,2-dimethyl-1-oxo-3-(triphenylmethoxy)propyl]thio]ethyl N-(2-ethoxy-2-oxoethyl)phosphoramidate]

Guanosine, 2'-C-methyl-, 5'-[2-[(3-hydroxy-2,2-dimethyl-1-oxopropyl)thio]ethyl P-(4-methyl-1-piperazinyl)phosphonate]

Guanosine, 2'-C-methyl-, 5'-[2-[[2,2-dimethyl-1-oxo-3-(triphenylmethoxy)propyl]thio]ethyl P-(4-methyl-1-piperazinyl)phosphonate]

Guanosine, 2'-C-methyl-, 5'-[2-[(3-hydroxy-2,2-dimethyl-1-oxopropyl)thio]ethyl N-(1,1-dimethylethyl)phosphoramidate]

Guanosine, 2'-C-methyl-, 5'-[2-[[2,2-dimethyl-1-oxo-3-(triphenylmethoxy)propyl]thio]ethyl N-(1,1-dimethylethyl)phosphoramidate]

Guanosine, 2'-C-methyl-, 5'-[2-[[2,2-dimethyl-1-oxo-3-(triphenylmethoxy)propyl]thio]ethyl P-4-morpholinylphosphonate]

Guanosine, 2'-C-methyl-, 5'-[2-[(3-hydroxy-2,2-dimethyl-1-oxopropyl)thio]ethyl P-4-morpholinylphosphonate]

Guanosine, 2'-C-methyl-, 5'-[2-[(3-hydroxy-2,2-dimethyl-1-oxopropyl)thio]ethyl N-(1-methylethyl)phosphoramidate]

Guanosine, 2'-C-methyl-, 5'-[2-[[2,2-dimethyl-1-oxo-3-(triphenylmethoxy)propyl]thio]ethyl phosphoramidate]

N-[[[(4R,6R,7S)-4-(4-Amino-2-oxo-1(2H)-pyrimidinyl)-7-hydroxy-5-oxaspiro[2.4]hept-6-yl]methoxy]phenoxyphosphinyl]-L-alanine methyl ester

N-[[[(4R,6R,7S)-4-(4-Amino-2-oxo-1(2H)-pyrimidinyl)-7-hydroxy-5-oxaspiro[2.4]hept-6-yl]methoxy]phenoxyphosphinyl]-L-phenylalanine ethyl ester

N-[[[(4R,6R,7S)-4-(4-Amino-2-oxo-1(2H)-pyrimidinyl)-7-hydroxy-5-oxaspiro[2.4]hept-6-yl]methoxy](4-chlorophenoxy)phosphinyl]-L-alanine phenylmethyl ester

N-[[[(4R,6R,7S)-4-(4-Amino-2-oxo-1(2H)-pyrimidinyl)-7-hydroxy-5-oxaspiro[2.4]hept-6-yl]methoxy]phenoxyphosphinyl]-L-alanine phenylmethyl ester

1-[5-O-[Hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-ribofuranosyl]-1H-imidazo[4,5-c]pyridin-4-amine

12-[(Hydroxymercaptophosphinyl)oxy]dodecyl hydrogen 3'-thymidylate

Thymidine, 3'-azido-3'-deoxy-, 5'-[hydrogen N-[2-(1H-indol-3-yl)ethyl]phosphoramidate]

5'-O-(8-Methyl-2-oxido-4H-1,3,2-benzodioxaphosphorin-2-yl)-N-1-naphthalenyladenosine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-3'-deoxy-3'-[[(2R)-2-pyrrolidinylcarbonyl]amino]thymidine

Adenosine, N-[2-[[2-[[[3-hydroxy-2-methyl-5-[(phosphonooxy)methyl]-4-pyridinyl]methylene]amino]ethyl]thio]ethyl]-

5,7-Dioxa-2,10-diaza-6-phosphatridec-12-ynoic acid, 13-[4-amino-7-[(2R,5S)-tetrahydro-5-(3,5,7,7-tetrahydroxy-3,5,7-trioxido-2,4,6-trioxa-3,5,7-triphosphahept-1-yl)-2-furanyl]-7H-pyrrolo[2,3-d]pyrimidin-5-yl]-6-hydroxy-9-oxo-, 1-(9H-fluoren-9-ylmethyl) ester, 6-oxide