9-[2,5-Dideoxy-3-O-[(1,1-dimethylethyl)dimethylsilyl]-2-fluoro-5-[[(4-nitrophenoxy)sulfonyl]amino]-β-D-ribofuranosyl]-9H-purine

6-Chloro-9-[2-deoxy-3-O-[(1,1-dimethylethyl)dimethylsilyl]-2-fluoro-β-D-ribofuranosyl]-9H-purine

N-[9-[(5S,7R,8R,10R,12aR,14R,15aS)-7-[1,6-Dihydro-2-[(2-methyl-1-oxopropyl)amino]-6-oxo-9H-purin-9-yl]octahydro-10-mercapto-2,2,10-trioxido-5,8-methano-3H,12H-furo[2,3-m]-1,6,9,11,2,3,10-tetraoxathiaazaphosphacyclotetradecin-14-yl]-9H-purin-6-yl]benzamide

N-[9-[(5S,7R,8R,12aR,14R,15aS)-7-[1,6-Dihydro-2-[(2-methyl-1-oxopropyl)amino]-6-oxo-9H-purin-9-yl]octahydro-10-hydroxy-2,2,10-trioxido-5,8-methano-3H,12H-furo[2,3-m]-1,6,9,11,2,3,10-tetraoxathiaazaphosphacyclotetradecin-14-yl]-9H-purin-6-yl]benzamide

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-deoxy-N-(2-methyl-1-oxopropyl)-, 2′-[N-[[(1R,2S,4R)-2-(hydroxyphosphinyl)-4-(9H-purinyl-9-yl)cyclopentyl]methyl]sulfamate]

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-deoxy-N-(2-methyl-1-oxopropyl)-, 2′-[N-[[(1R,2S,4R)-2-hydroxy-4-(9H-purinyl-9-yl)cyclopentyl]methyl]sulfamate]