Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-N-(2-methyl-1-oxopropyl)-3′-O-[(1′R,3′aR)-tetrahydrospiro[cyclopentane-1,3′-[1H,3H]pyrrolo[1,2-c][1,3,2]oxazaphosphol]-1′-yl]-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-N-(2-methyl-1-oxopropyl)-3′-O-[(1′S,3′aS)-tetrahydrospiro[cyclopentane-1,3′-[1H,3H]pyrrolo[1,2-c][1,3,2]oxazaphosphol]-1′-yl]-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-N-(2-methyl-1-oxopropyl)-3′-O-[(1′S,3′aS)-tetrahydrospiro[cyclopropane-1,3′-[1H,3H]pyrrolo[1,2-c][1,3,2]oxazaphosphol]-1′-yl]-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-N-(2-methyl-1-oxopropyl)-3′-O-[(1S,3S,3aS)-tetrahydro-3-methyl-3-(1-methylethyl)-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-N-(2-methyl-1-oxopropyl)-3′-O-[(1S,3R,3aS)-tetrahydro-3-methyl-3-(1-methylethyl)-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(1S,3S,4aS)-hexahydro-3-phenyl-1H-pyrrolo[1,2-c][1,3,2]oxazaphosphor-1-yl]-N-(2-methyl-1-oxopropyl)-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(1R,3S,4aS)-hexahydro-3-phenyl-1H-pyrrolo[1,2-c][1,3,2]oxazaphosphor-1-yl]-N-(2-methyl-1-oxopropyl)-

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(3S,3aS)-tetrahydro-3-[(1-methylsilacyclohex-1-yl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(3S,3aS)-tetrahydro-3-[(1-methylsilacyclopent-1-yl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(3S,3aS)-tetrahydro-3-[[tris(1-methylethyl)silyl]methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-O-[(2S,3aS,7aR)-7a-cyclohexylhexahydro-3-methyl-1,3,2-benzoxazaphosphol-2(3H)-yl]-2′-deoxy-N-(2-methyl-1-oxopropyl)-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(3aS,6aS)-hexahydro-3-methyl-6a-phenyl-2H-cyclopenta[d]-1,3,2-oxazaphosphol-2-yl]-N-(2-methyl-1-oxopropyl)-

Cytidine, N-[1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-3-O-[(2S,3aS,7aS)-hexahydro-3-methyl-7a-phenyl-1,3,2-benzoxazaphosphol-2(3H)-yl]-β-D-erythro-pentofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]-2-methyl-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(2R,3aS,7aS)-hexahydro-3-methyl-7a-phenyl-1,3,2-benzoxazaphosphol-2(3H)-yl]-N-(2-methyl-1-oxopropyl)-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(2S,3aS,7aR)-hexahydro-3-methyl-7a-phenyl-1,3,2-benzoxazaphosphol-2(3H)-yl]-N-(2-methyl-1-oxopropyl)-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(2R,3aS,7aR)-hexahydro-3-methyl-7a-phenyl-1,3,2-benzoxazaphosphol-2(3H)-yl]-N-(2-methyl-1-oxopropyl)-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(2R,3aR,7aR)-hexahydro-3-methyl-7a-phenyl-1,3,2-benzoxazaphosphol-2(3H)-yl]-N-(2-methyl-1-oxopropyl)-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(2S,3aR,7aR)-hexahydro-3-methyl-7a-phenyl-1,3,2-benzoxazaphosphol-2(3H)-yl]-N-(2-methyl-1-oxopropyl)-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(2R,3aR,7aS)-hexahydro-3-methyl-7a-phenyl-1,3,2-benzoxazaphosphol-2(3H)-yl]-N-(2-methyl-1-oxopropyl)-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(2S,3aR,7aS)-hexahydro-3-methyl-7a-phenyl-1,3,2-benzoxazaphosphol-2(3H)-yl]-N-(2-methyl-1-oxopropyl)-