Uridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 2′-[[4-[[4-[3,4,5-tris(octadecyloxy)benzoyl]-1-piperazinyl]carbonyl]phenyl]methyl carbonate]

Uridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 2′-(1H-imidazole-1-carboxylate)

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

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-(1H-imidazole-1-carboxylate)

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-(1H-imidazole-1-carboxylate)

Uridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-(1H-imidazole-1-carboxylate)

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-, 3′-(1H-imidazole-1-carboxylate)

1H-Pyrrol-1-yloxy, 3-[[[(2E)-3-[4-amino-1-(2-deoxy-β-D-erythro-pentofuranosyl)-1,2-dihydro-2-oxo-5-pyrimidinyl]-2-propenyl]amino]carbonyl]-2,5-dihydro-2,2,5,5-tetramethyl-

1H-Pyrrol-1-yloxy, 3-[[[(2E)-3-[1-(2-deoxy-β-D-erythro-pentofuranosyl)-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]-2-propenyl]amino]carbonyl]-2,5-dihydro-2,2,5,5-tetramethyl-