Guanosine, 2′,3′-dideoxy-N-(2-methyl-1-oxopropyl)-3′-[(triphenylmethyl)amino]-, 5′-[2-cyanoethyl [(2R,6S)-2,6-dimethyl-1-piperidinyl]phosphonite] 6-(diphenylcarbamate)

Cytidine, N-benzoyl-2′,3′-dideoxy-3′-[(triphenylmethyl)amino]-, 5′-[2-cyanoethyl [(2R,6S)-2,6-dimethyl-1-piperidinyl]phosphonite]

Adenosine, N-benzoyl-2′,3′-dideoxy-3′-[(triphenylmethyl)amino]-, 5′-[2-cyanoethyl [(2R,6S)-2,6-dimethyl-1-piperidinyl]phosphonite]

Thymidine, 3′-deoxy-3′-[(triphenylmethyl)amino]-, 5′-[2-cyanoethyl (1,1-dimethylethyl)(1-methylethyl)phosphoramidite]

Guanosine, 3′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-5′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2-methyl-1-oxopropyl)-, 6-(diphenylcarbamate)

Guanosine, 3′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-5′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2-methyl-1-oxopropyl)-

N-[[P(S),2′R]-2′-Deoxy-P-(2,3-dihydro-1,4-benzodioxin-5-yl)-2′-fluoro-2′-methyl-5′-uridylyl]-L-alanine 1-methylethyl ester

N-[1-(3-O-Benzoyl-2-deoxy-2-fluoro-2-methyl-α-D-ribofuranosyl)-1,2-dihydro-2-oxo-4-pyrimidinyl]benzamide

1-(3-O-Benzoyl-2-deoxy-2-fluoro-2-methyl-α-D-ribofuranosyl)-2,4(1H,3H)-pyrimidinedione