9-[(2R,4S,5R)-5-[(1R)-1-[Bis(4-methoxyphenyl)phenylmethoxy]-3-buten-1-yl]-4-[[(1,1-dimethylethyl)dimethylsilyl]oxy]tetrahydro-2-furanyl]-1,9-dihydro-2-[(2-methylpropyl)amino]-6H-purin-6-one

9-[(2R,4S,5R)-4-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]tetrahydro-5-[(1S)-1-hydroxy-3-buten-1-yl]-2-furanyl]-1,9-dihydro-2-[(2-methylpropyl)amino]-6H-purin-6-one

9-[(2R,4S,5R)-4-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]tetrahydro-5-[(1R)-1-hydroxy-3-buten-1-yl]-2-furanyl]-1,9-dihydro-2-[(2-methylpropyl)amino]-6H-purin-6-one

N-[9-[(2R,4S,5S)-5-[(1S)-1-[Bis(4-methoxyphenyl)phenylmethoxy]-3-buten-1-yl]tetrahydro-4-hydroxy-2-furanyl]-9H-purin-6-yl]benzamide

N-[9-[(2R,4S,5S)-5-[(1R)-1-[Bis(4-methoxyphenyl)phenylmethoxy]-3-buten-1-yl]tetrahydro-4-hydroxy-2-furanyl]-9H-purin-6-yl]benzamide

N-[9-[(2R,4S,5R)-5-[(1S)-1-[Bis(4-methoxyphenyl)phenylmethoxy]-3-buten-1-yl]-4-[[(1,1-dimethylethyl)dimethylsilyl]oxy]tetrahydro-2-furanyl]-9H-purin-6-yl]benzamide

N-[9-[(2R,4S,5R)-5-[(1R)-1-[Bis(4-methoxyphenyl)phenylmethoxy]-3-buten-1-yl]-4-[[(1,1-dimethylethyl)dimethylsilyl]oxy]tetrahydro-2-furanyl]-9H-purin-6-yl]benzamide

N-[9-[(2R,4S,5R)-4-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]tetrahydro-5-[(1S)-1-hydroxy-3-buten-1-yl]-2-furanyl]-9H-purin-6-yl]benzamide

N-[9-[(2R,4S,5R)-4-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]tetrahydro-5-[(1R)-1-hydroxy-3-buten-1-yl]-2-furanyl]-9H-purin-6-yl]benzamide

1-[(2R,4S,5R)-4-[[(1,1-Dimethylethyl)diphenylsilyl]oxy]tetrahydro-5-[(1R)-1-[(4-nitrobenzoyl)oxy]-3-buten-1-yl]-2-furanyl]-5-methyl-2,4(1H,3H)-pyrimidinedione