3′-Deoxy-3′-[[4-[[(1,1-dimethylethoxy)carbonyl]amino]-1-oxobutyl]amino]thymidine

3′-Deoxy-3′-[[(6-hydrazinyl-3-pyridinyl)carbonyl]amino]thymidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-3′-deoxy-3′-[[6-[[(1,1-dimethylethoxy)carbonyl]amino]-1-oxohexyl]amino]thymidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-3′-deoxy-3′-[[11-[[(1,1-dimethylethoxy)carbonyl]amino]-1-oxoundecyl]amino]thymidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-3′-deoxy-3′-[[4-[[(1,1-dimethylethoxy)carbonyl]amino]-1-oxobutyl]amino]thymidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-3′-deoxy-3′-[[[6-[2-[(1,1-dimethylethoxy)carbonyl]hydrazinyl]-3-pyridinyl]carbonyl]amino]thymidine

Phenylmethyl 6-[6-[[(1,1-dimethylethoxy)carbonyl]amino]-9-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-9H-purin-8-yl]-5-hexynoate

1,1-Dimethylethyl N-[(3aR,4R,21R,21aR)-3a,4,9,10,11,12,13,14,21,21a-decahydro-2,2-dimethyl-7,7-dioxido-9-oxo-4,21-epoxy-5H,8H-1,3-dioxolo[13,14][1,2,3,11]oxathiadiazacyclohexadecino[11,10-e]purin-16-yl]carbamate

9-[5-O-(Aminosulfonyl)-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-6-[[(1,1-dimethylethoxy)carbonyl]amino]-9H-purine-8-hexanoic acid

Phenylmethyl 6-[9-[5-O-(aminosulfonyl)-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-6-[[(1,1-dimethylethoxy)carbonyl]amino]-9H-purin-8-yl]-5-hexynoate

1,3-Bis(1,1-dimethylethyl) 2-[(3aR,4R,21R,21aR)-10-[[(1,1-dimethylethoxy)carbonyl]amino]-3a,4,9,10,11,12,13,14,21,21a-decahydro-2,2-dimethyl-7,7-dioxido-9-oxo-4,21-epoxy-5H,8H-1,3-dioxolo[13,14][1,2,3,11]oxathiadiazacyclohexadecino[11,10-e]purin-16-yl]imidodicarbonate

Phenylmethyl 6-[9-[5-O-(aminosulfonyl)-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-6-[bis[(1,1-dimethylethoxy)carbonyl]amino]-9H-purin-8-yl]-2-[[(1,1-dimethylethoxy)carbonyl]amino]-4-hexenoate

9-[5-O-(Aminosulfonyl)-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-6-[bis[(1,1-dimethylethoxy)carbonyl]amino]-α-[[(1,1-dimethylethoxy)carbonyl]amino]-9H-purine-8-hexanoic acid

(αS)-9-[5-O-(Aminosulfonyl)-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-6-[bis[(1,1-dimethylethoxy)carbonyl]amino]-α-[[(1,1-dimethylethoxy)carbonyl]amino]-9H-purine-8-hexanoic acid

1,3-Bis(1,1-dimethylethyl) 2-[(3aR,4R,10S,21R,21aR)-10-[[(1,1-dimethylethoxy)carbonyl]amino]-3a,4,9,10,11,12,13,14,21,21a-decahydro-2,2-dimethyl-7,7-dioxido-9-oxo-4,21-epoxy-5H,8H-1,3-dioxolo[13,14][1,2,3,11]oxathiadiazacyclohexadecino[11,10-e]purin-16-yl]imidodicarbonate

Phenylmethyl (2S)-6-[9-[5-O-(aminosulfonyl)-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-6-[bis[(1,1-dimethylethoxy)carbonyl]amino]-9H-purin-8-yl]-2-[[(1,1-dimethylethoxy)carbonyl]amino]-4-hexenoate

Phenylmethyl 6-[6-[bis[(1,1-dimethylethoxy)carbonyl]amino]-9-[5-O-[(1,1-dimethylethyl)dimethylsilyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-9H-purin-8-yl]-2-[[(1,1-dimethylethoxy)carbonyl]amino]-4-hexenoate

Phenylmethyl 6-[6-[bis[(1,1-dimethylethoxy)carbonyl]amino]-9-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-9H-purin-8-yl]-2-[[(1,1-dimethylethoxy)carbonyl]amino]-4-hexenoate

Phenylmethyl (2S)-6-[6-[bis[(1,1-dimethylethoxy)carbonyl]amino]-9-[5-O-[(1,1-dimethylethyl)dimethylsilyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-9H-purin-8-yl]-2-[[(1,1-dimethylethoxy)carbonyl]amino]-4-hexenoate

Phenylmethyl (2S)-6-[6-[bis[(1,1-dimethylethoxy)carbonyl]amino]-9-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-9H-purin-8-yl]-2-[[(1,1-dimethylethoxy)carbonyl]amino]-4-hexenoate