4-Chloro-7-[5-deoxy-5-[7-[(1,1-dimethylethoxy)carbonyl]-1,7-diazaspiro[4.5]dec-1-yl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidine

4-Chloro-7-[5-deoxy-5-[8-[(1,1-dimethylethoxy)carbonyl]-1,8-diazaspiro[4.6]undec-1-yl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidine

4-Chloro-7-[5-deoxy-5-[8-[(1,1-dimethylethoxy)carbonyl]-2-(trifluoromethyl)-1,8-diazaspiro[4.5]dec-1-yl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidine

4-Chloro-7-[5-deoxy-5-[9-[(1,1-dimethylethoxy)carbonyl]-2,9-diazaspiro[5.5]undec-2-yl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidine

4-Chloro-7-[5-deoxy-5-[9-[(1,1-dimethylethoxy)carbonyl]-1,9-diazaspiro[5.5]undec-1-yl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidine

4-Chloro-7-[5-deoxy-5-[7-[(1,1-dimethylethoxy)carbonyl]-1,7-diazaspiro[3.5]non-1-yl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidine

4-Chloro-7-[5-deoxy-5-[2-[(1,1-dimethylethoxy)carbonyl]-9-oxa-2,6-diazaspiro[4.5]dec-6-yl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidine

4-Chloro-7-[5-deoxy-5-[9-[(1,1-dimethylethoxy)carbonyl]-4-oxa-1,9-diazaspiro[5.5]undec-1-yl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidine

N-[7-[5-Deoxy-5-(3,3-difluoro-8-methyl-1,8-diazaspiro[4.5]dec-1-yl)-2,3-bis-O-(2-methyl-1-oxopropyl)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-yl]-2-methylpropanamide

N′-[7-[5-Deoxy-5-(3,3-difluoro-8-methyl-1,8-diazaspiro[4.5]dec-1-yl)-2,3-bis-O-(2-methyl-1-oxopropyl)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-yl]-N,N-dimethylmethanimidamide

N′-[7-[5-Deoxy-5-(3,3-difluoro-8-methyl-1,8-diazaspiro[4.5]dec-1-yl)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-yl]-N,N-dimethylmethanimidamide

N-[7-[2,3-Di-O-acetyl-5-deoxy-5-(8-methyl-1,8-diazaspiro[4.5]dec-1-yl)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-yl]acetamide

N-[7-[5-Deoxy-5-(8-methyl-1,8-diazaspiro[4.5]dec-1-yl)-2,3-bis-O-(2-methyl-1-oxopropyl)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-yl]-2-methylpropanamide

7-[5-Deoxy-5-[8-[(1,1-dimethylethoxy)carbonyl]-1,8-diazaspiro[4.5]dec-1-yl]-2,3-bis-O-(2-methyl-1-oxopropyl)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

N-[7-[5-Deoxy-5-[8-[(1,1-dimethylethoxy)carbonyl]-1,8-diazaspiro[4.5]dec-1-yl]-2,3-bis-O-(2-methyl-1-oxopropyl)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-yl]-2-methylpropanamide

4-Chloro-7-[5-(8-cyclopropyl-3,3-difluoro-1,8-diazaspiro[4.5]dec-1-yl)-5-deoxy-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidine

7-[5-[2-(Aminomethyl)-5,5-difluoro-1-piperidinyl]-5-deoxy-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

N-[7-[5-Deoxy-5-[5,5-difluoro-2-[[(methylsulfonyl)oxy]methyl]-1-piperidinyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-yl]methanesulfonamide

7-[5-Deoxy-5-[5,5-difluoro-2-(hydroxymethyl)-1-piperidinyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

7-[5-Deoxy-5-(3,3-difluoro-1,8-diazaspiro[4.5]dec-1-yl)-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine