Thymidine, 2′-deoxycytidylyl-(3′→5′)-5-methyl-2′-O,4′-C-methyleneuridylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-O,4′-C-methylenecytidylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-O,4′-C-methyleneadenylyl-(3′→5′)-2′-O,4′-C-methyleneguanylyl-(3′→5′)-

Cytidine, 2′-deoxyguanylyl-(3′→5′)-5-methyl-2′-O,4′-C-methyleneuridylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-O,4′-C-methylenecytidylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-O,4′-C-methyleneadenylyl-(3′→5′)-2′-O,4′-C-methyleneguanylyl-(3′→5′)-2′-deoxy-

Guanosine, 5-methyl-2′-O,4′-C-methyleneuridylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-O,4′-C-methylenecytidylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-O,4′-C-methyleneadenylyl-(3′→5′)-2′-O,4′-C-methylene-

Adenosine, 2′-deoxyguanylyl-(3′→5′)-5-methyl-2′-O,4′-C-methyleneuridylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-O,4′-C-methylenecytidylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-O,4′-C-methyleneadenylyl-(3′→5′)-2′-O,4′-C-methyleneguanylyl-(3′→5′)-2′-deoxy-

Thymidine 5′-(trihydrogen diphosphate), P′-(4-O-acetyl-3-azido-2,3,6-trideoxy-3-C-methyl-β-L-lyxo-hexopyranosyl) ester

Thymidine 5′-(trihydrogen diphosphate), P′-(4-O-acetyl-3-azido-2,3,6-trideoxy-β-L-arabino-hexopyranosyl) ester

Thymidine 5′-(trihydrogen diphosphate), P′-(4-O-acetyl-3-azido-2,3,6-trideoxy-β-L-lyxo-hexopyranosyl) ester

Thymidine 5′-(trihydrogen diphosphate), P′-(3-amino-2,3,6-trideoxy-3-C-methyl-β-L-lyxo-hexopyranosyl) ester

Thymidine 5′-(trihydrogen diphosphate), P′-(4-O-acetyl-3-azido-2,3,6-trideoxy-L-arabino-hexopyranosyl) ester

2-Amino-9-[(2R,3R,4S,5S,6R)-6-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-3,4-dihydroxy-1-oxaspiro[4.4]non-2-yl]-1,9-dihydro-6H-purin-6-one

(2S,3R,4S,5S,6R)-2-(2-Amino-6-chloro-9H-purin-9-yl)-6-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-1-oxaspiro[4.4]nonane-3,4-diol

(2R,3R,4S,5S,6R)-2-(2-Amino-6-chloro-9H-purin-9-yl)-6-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-1-oxaspiro[4.4]nonane-3,4-diol

6-Chloro-7-[(2S,5S,6R)-6-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-1-oxaspiro[4.4]non-2-yl]-7H-purine

6-Chloro-7-[(2R,5S,6R)-6-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-1-oxaspiro[4.4]non-2-yl]-7H-purine

(5S,6R)-2-(6-Amino-9H-purin-9-yl)-1-oxaspiro[4.4]nonan-6-ol

9-[(5S,6R)-6-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-1-oxaspiro[4.4]non-2-yl]-9H-purin-6-amine

9-[(5S,6R)-6-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-1-oxaspiro[4.4]non-2-yl]-6-methoxy-9H-purine

6-Chloro-9-[(2S,5S,6R)-6-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-1-oxaspiro[4.4]non-2-yl]-9H-purine

6-Chloro-9-[(2R,5S,6R)-6-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-1-oxaspiro[4.4]non-2-yl]-9H-purine

6-Chloro-7-[(2S,5S,6S)-6-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-1-oxaspiro[4.4]non-2-yl]-7H-purine