7-[5,6-Dideoxy-2,3-O-(1-methylethylidene)-β-D-ribo-hex-5-enofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

7-[6-(2H-1,4-Benzoxazin-6-yl)-5,6-dideoxy-β-D-ribo-hexofuranosyl]-7H-pyrrolo[2,3-d]pyrimidine

7-[5,6-Dideoxy-6-(1,1-dioxido-2H-1,2,4-benzothiadiazin-6-yl)-β-D-ribo-hexofuranosyl]-7H-pyrrolo[2,3-d]pyrimidine

7-[6-(3-Amino-2,2-dimethyl-2H-1,4-benzoxazin-6-yl)-5,6-dideoxy-β-D-ribo-hexofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

7-[5,6-Dideoxy-6-[(2S)-3,4-dihydro-2-methyl-2H-1,4-oxazino[3,2-b]quinolin-7-yl]-β-D-ribo-hexofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

7-[5,6-Dideoxy-6-[(2R)-3,4-dihydro-2-methyl-2H-1,4-oxazino[3,2-b]quinolin-7-yl]-β-D-ribo-hexofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

7-[6-(3-Amino-2-methyl-1,1-dioxido-2H-1,2,4-benzothiadiazin-6-yl)-5,6-dideoxy-β-D-ribo-hexofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

5-Oxaspiro[3.4]octane-7,8-diol, 6-(6-amino-9H-purin-9-yl)-2-[(3-chloro-7-quinolinyl)methyl]-, (2α,4β,6R,7R,8S)-

5-Oxaspiro[3.4]octane-7,8-diol, 6-(6-amino-9H-purin-9-yl)-2-[(3-chloro-7-quinolinyl)oxy]-, (2α,4β,6R,7R,8S)-

9-[(1α,3β,3′aS,6′R,6′aR)-3-[(3-Chloro-7-quinolinyl)oxy]dihydro-2′,2′-dimethylspiro[cyclobutane-1,4′(3′aH)-furo[3,4-d][1,3]dioxol]-6′-yl]-9H-purin-6-amine

N′-[9-[(1α,3β,3′aS,6′R,6′aR)-3-[(3-Chloro-7-quinolinyl)oxy]dihydro-2′,2′-dimethylspiro[cyclobutane-1,4′(3′aH)-furo[3,4-d][1,3]dioxol]-6′-yl]-9H-purin-6-yl]-N,N-dimethylmethanimidamide

N′-[9-[(1α,3α,3′aS,6′R,6′aR)-Dihydro-3-hydroxy-2′,2′-dimethylspiro[cyclobutane-1,4′(3′aH)-furo[3,4-d][1,3]dioxol]-6′-yl]-9H-purin-6-yl]-N,N-dimethylmethanimidamide

9-[(1α,3α,3′aS,6′R,6′aR)-3-[(3-Chloro-7-quinolinyl)methyl]dihydro-2′,2′-dimethylspiro[cyclobutane-1,4′(3′aH)-furo[3,4-d][1,3]dioxol]-6′-yl]-9H-purin-6-amine

9-[(3′aS,6′R,6′aR)-Dihydro-2′,2′-dimethyl-3-methylenespiro[cyclobutane-1,4′(3′aH)-furo[3,4-d][1,3]dioxol]-6′-yl]-9H-purin-6-amine