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

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[methyl (S)-phosphonate]

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[methyl (S)-phosphonate]

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[methyl (R)-phosphonate]

Uridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[4-chlorophenyl (R)-phosphonate]

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

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[4-chlorophenyl (R)-phosphonate]

Uridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[ethyl (R)-phosphonate]

Uridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[4-nitrophenyl (R)-phosphonate]

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

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[4-nitrophenyl (R)-phosphonate]

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[4-nitrophenyl (R)-phosphonate]

Uridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[hydrogen (R)-phosphonate], anhydride with 2,2-dimethylpropanoic acid

Thymidine, α-(1,5-dihydro-3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-ylidene)-, (αE)-

Uridine, 5-(2-amino-3-cyano-5-hydroxy-4H-naphtho[2,3-b]pyran-4-yl)-2′-deoxy-, 3′,5′-diacetate

Uridine, 5-(2-amino-3-cyano-5-hydroxy-4H-naphtho[2,3-b]pyran-4-yl)-2′-deoxy-

Uridine, 5-[2-amino-3-cyano-7-(dimethylamino)-4H-1-benzopyran-4-yl]-2′-deoxy-

Ethyl 2-amino-4-[1-(3,5-di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]-5,6,7,8-tetrahydro-7,7-dimethyl-5-oxo-4H-1-benzopyran-3-carboxylate

Ethyl 2-amino-4-[1-(2-deoxy-β-D-erythro-pentofuranosyl)-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]-5,6,7,8-tetrahydro-7,7-dimethyl-5-oxo-4H-1-benzopyran-3-carboxylate

Ethyl 2-amino-4-[1-(2-deoxy-β-D-erythro-pentofuranosyl)-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]-5,6,7,8-tetrahydro-5-oxo-4H-1-benzopyran-3-carboxylate