6-Oxa-2,4-diaza-9-siladec-2-enoic acid, 3-[(1R,3R,4R,7S)-1-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-3-[6-[[(diphenylamino)carbonyl]oxy]-2-[(2-methyl-1-oxopropyl)amino]-9H-purin-9-yl]-7-hydroxy-2-oxa-5-azabicyclo[2.2.1]hept-5-yl]-9,9-dimethyl-5-oxo-, 2-(trimethylsilyl)ethyl ester

2-(Trimethylsilyl)ethyl 3-[(1R,3R,4R,7S)-3-[6-(benzoylamino)-9H-purin-9-yl]-1-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-7-[[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]oxy]-2-oxa-5-azabicyclo[2.2.1]hept-5-yl]-9,9-dimethyl-5-oxo-6-oxa-2,4-diaza-9-siladec-2-enoate

2-(Trimethylsilyl)ethyl 3-[(1R,3R,4R,7S)-3-[6-(benzoylamino)-9H-purin-9-yl]-1-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-7-hydroxy-2-oxa-5-azabicyclo[2.2.1]hept-5-yl]-9,9-dimethyl-5-oxo-6-oxa-2,4-diaza-9-siladec-2-enoate

N-[1-[(1R,3R,4R,7S)-1-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-7-hydroxy-2-oxa-5-azabicyclo[2.2.1]hept-3-yl]-1,2-dihydro-2-oxo-4-pyrimidinyl]benzamide

N-[1-[(1R,3R,4R,7S)-1-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-7-[(trimethylsilyl)oxy]-2-oxa-5-azabicyclo[2.2.1]hept-3-yl]-1,2-dihydro-2-oxo-4-pyrimidinyl]benzamide

N-[1-[(1R,3R,4R,7S)-1-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-7-[(trimethylsilyl)oxy]-2-oxa-5-azabicyclo[2.2.1]hept-3-yl]-1,2-dihydro-5-methyl-2-oxo-4-pyrimidinyl]benzamide

9-[(1R,3R,4R,7S)-1-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-7-hydroxy-2-oxa-5-azabicyclo[2.2.1]hept-3-yl]-2-[(2-methyl-1-oxopropyl)amino]-9H-purin-6-yl N,N-diphenylcarbamate

9-[(1R,3R,4R,7S)-1-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-7-[(trimethylsilyl)oxy]-2-oxa-5-azabicyclo[2.2.1]hept-3-yl]-2-[(2-methyl-1-oxopropyl)amino]-9H-purin-6-yl N,N-diphenylcarbamate

N-[9-[(1R,3R,4R,7S)-1-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-7-hydroxy-2-oxa-5-azabicyclo[2.2.1]hept-3-yl]-9H-purin-6-yl]benzamide

N-[9-[(1R,3R,4R,7S)-1-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-7-[(trimethylsilyl)oxy]-2-oxa-5-azabicyclo[2.2.1]hept-3-yl]-9H-purin-6-yl]benzamide

N-[1,2-Dihydro-2-oxo-1-[(1R,3R,4R,7S)-7-(phenylmethoxy)-1-[(phenylmethoxy)methyl]-2-oxa-5-azabicyclo[2.2.1]hept-3-yl]-4-pyrimidinyl]benzamide

N-[1,2-Dihydro-5-methyl-2-oxo-1-[(1R,3R,4R,7S)-7-(phenylmethoxy)-1-[(phenylmethoxy)methyl]-2-oxa-5-azabicyclo[2.2.1]hept-3-yl]-4-pyrimidinyl]benzamide

2-[(2-Methyl-1-oxopropyl)amino]-9-[(1R,3R,4R,7S)-7-(phenylmethoxy)-1-[(phenylmethoxy)methyl]-2-oxa-5-azabicyclo[2.2.1]hept-3-yl]-9H-purin-6-yl N,N-diphenylcarbamate

N-[9-[(1R,3R,4R,7S)-7-(Phenylmethoxy)-1-[(phenylmethoxy)methyl]-2-oxa-5-azabicyclo[2.2.1]hept-3-yl]-9H-purin-6-yl]benzamide

2′-Amino-2′-deoxy-5-methyl-4′-C-[[(methylsulfonyl)oxy]methyl]-3′,5′-bis-O-(phenylmethyl)uridine

2-(Trimethylsilyl)ethyl 3-[(1R,3R,4R,7S)-1-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-7-[[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]oxy]-3-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-2-oxa-5-azabicyclo[2.2.1]hept-5-yl]-9,9-dimethyl-5-oxo-6-oxa-2,4-diaza-9-siladec-2-enoate

2-(Trimethylsilyl)ethyl 3-[(1R,3R,4R,7S)-1-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-3-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-7-hydroxy-2-oxa-5-azabicyclo[2.2.1]hept-5-yl]-9,9-dimethyl-5-oxo-6-oxa-2,4-diaza-9-siladec-3-enoate

5-Methyl-1-[(1R,3R,4R,7S)-7-(phenylmethoxy)-1-[(phenylmethoxy)methyl]-2-oxa-5-azabicyclo[2.2.1]hept-3-yl]-2,4(1H,3H)-pyrimidinedione

2H,3H,6H-Furo[2′,3′:4,5]oxazolo[3,2-a]pyrimidin-6-one, 3a,9a-dihydro-7-methyl-2-[[(methylsulfonyl)oxy]methyl]-3-(phenylmethoxy)-2-[(phenylmethoxy)methyl]-, (2S,3S,3aS,9aR)-

(2R,3S,3aS,9aR)-2-(Azidomethyl)-3a,9a-dihydro-7-methyl-3-(phenylmethoxy)-2-[(phenylmethoxy)methyl]-2H,3H,6H-furo[2′,3′:4,5]oxazolo[3,2-a]pyrimidin-6-one