Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-de(phosphinicooxy)thymidylyl(2-oxo-1,2-ethanediyl)imino-(3′→5′)-5′-deoxy-5′-methyl-, (5′R)-

Thymidine, 3′-de(phosphinicooxy)thymidylyl(2-oxo-1,2-ethanediyl)imino-(3′→5′)-5′-deoxy-5′-methyl-, (5′R)-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-de(phosphinicooxy)-5-methyl-2′-O-methyluridylyl(2-oxo-1,2-ethanediyl)imino-(3′→5′)-5′-deoxy-5,5′-dimethyl-2′-O-methyl-N-(1-methyl-2-pyrrolidinyl)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite], (5′S)-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-de(phosphinicooxy)-5-methyl-2′-O-methyluridylyl(2-oxo-1,2-ethanediyl)imino-(3′→5′)-5′-deoxy-5,5′-dimethyl-2′-O-methyl-N-(1-methyl-2-pyrrolidinyl)-, (5′S)-

Cytidine, 3′-de(phosphinicooxy)-5-methyl-2′-O-methyluridylyl(2-oxo-1,2-ethanediyl)imino-(3′→5′)-5′-deoxy-5,5′-dimethyl-2′-O-methyl-N-(1-methyl-2-pyrrolidinyl)-, (5′S)-

Cytidine, 3′-de(phosphinicooxy)-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyl-2′-O-methyluridylyl(2-oxo-1,2-ethanediyl)imino-(3′→5′)-5′-deoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5,5′-dimethyl-2′-O-methyl-N-(1-methyl-2-pyrrolidinyl)-, (5′S)-

Thymidine, 3′-de(phosphinicooxy)-5′-O-[(1,1-dimethylethyl)dimethylsilyl]thymidylyl(2-oxo-1,2-ethanediyl)imino-(3′→5′)-5′-deoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5′-methyl-, (5′R)-

1-[5-Amino-5,6-dideoxy-3-O-[(1,1-dimethylethyl)diphenylsilyl]-2-O-methyl-α-L-talofuranosyl]-5-methyl-4-[(1-methyl-2-pyrrolidinylidene)amino]-2(1H)-pyrimidinone

1-[5-Azido-5,6-dideoxy-3-O-[(1,1-dimethylethyl)diphenylsilyl]-2-O-methyl-α-L-talofuranosyl]-5-methyl-4-[(1-methyl-2-pyrrolidinylidene)amino]-2(1H)-pyrimidinone

1-[5-Azido-5,6-dideoxy-3-O-[(1,1-dimethylethyl)diphenylsilyl]-2-O-methyl-α-L-talofuranosyl]-5-methyl-4-(1H-1,2,4-triazol-1-yl)-2(1H)-pyrimidinone

1-[5-Azido-5,6-dideoxy-3-O-[(4-methoxyphenyl)methyl]-2-O-methyl-α-L-talofuranosyl]-3-[(4-methoxyphenyl)methyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[5-Azido-5,6-dideoxy-3-O-[(4-methoxyphenyl)methyl]-α-L-talofuranosyl]-3-[(4-methoxyphenyl)methyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[2-O-Acetyl-5-azido-5,6-dideoxy-3-O-[(4-methoxyphenyl)methyl]-α-L-talofuranosyl]-3-[(4-methoxyphenyl)methyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

Uridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-de(phosphinicooxy)-5-methyl-2′-O-methyluridylyl(2-oxo-1,2-ethanediyl)imino-(3′→5′)-5′-deoxy-5,5′-dimethyl-2′-O-methyl-, (5′S)-

Uridine, 3′-de(phosphinicooxy)-5-methyl-2′-O-methyluridylyl(2-oxo-1,2-ethanediyl)imino-(3′→5′)-5′-deoxy-5,5′-dimethyl-2′-O-methyl-, (5′S)-

Uridine, 3′-de(phosphinicooxy)-5-methyl-2′-O-methyluridylyl(2-oxo-1,2-ethanediyl)imino-(3′→5′)-5′-deoxy-5,5′-dimethyl-2′-O-methyl-3′-O-(phenylmethyl)-, (5′S)-

Uridine, 3′-de(phosphinicooxy)-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyl-2′-O-methyluridylyl(2-oxo-1,2-ethanediyl)imino-(3′→5′)-5′-deoxy-5,5′-dimethyl-2′-O-methyl-3′-O-(phenylmethyl)-, (5′S)-

Uridine, 3′-de(phosphinicooxy)-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyl-2′-O-methyluridylyl(2-oxo-1,2-ethanediyl)imino-(3′→5′)-5′-deoxy-3-[(4-methoxyphenyl)methyl]-5,5′-dimethyl-2′-O-methyl-3′-O-(phenylmethyl)-, (5′S)-

1-[5-Amino-5,6-dideoxy-2-O-methyl-3-O-(phenylmethyl)-α-L-talofuranosyl]-3-[(4-methoxyphenyl)methyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[5-Azido-5,6-dideoxy-2-O-methyl-3-O-(phenylmethyl)-α-L-talofuranosyl]-3-[(4-methoxyphenyl)methyl]-5-methyl-2,4(1H,3H)-pyrimidinedione