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

Uridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-2′-fluoro-3′-O-[(2S,3aS,7aS)-hexahydro-3,7a-dimethyl-1,3,2-benzoxazaphosphol-2(3H)-yl]-

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-2′-fluoro-3′-O-[(2S,3aS,7aS)-hexahydro-3,7a-dimethyl-1,3,2-benzoxazaphosphol-2(3H)-yl]-

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-methyl-3′-O-[(2S,3aS,7aS)-hexahydro-3,7a-dimethyl-1,3,2-benzoxazaphosphol-2(3H)-yl]-

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-2′-fluoro-3′-O-[(2S,3aS,7aS)-hexahydro-3,7a-dimethyl-1,3,2-benzoxazaphosphol-2(3H)-yl]-

Guanosine, 5-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-2′-O-fluoro-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]-

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

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

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

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