4H-Imidazo[4,5-d]pyridazin-4-one, 1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-3-O-[(1S,3S,3aS)-tetrahydro-3-[(phenylsulfonyl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-β-D-erythro-pentofuranosyl]-1,5-dihydro-

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

Inosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-1-[(diphenylamino)carbonyl]-3′-O-[(1S,3S,3aS)-tetrahydro-3-[(phenylsulfonyl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-

Inosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(1R,3R,3aR)-tetrahydro-3-[(phenylsulfonyl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-, 6-(N,N-diphenylcarbamate)

Inosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-1-[(diphenylamino)carbonyl]-3′-O-[(1R,3R,3aR)-tetrahydro-3-[(phenylsulfonyl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-

2,4(1H,3H)-Pyrimidinedione, 3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[(1,1-dimethylethyl)dimethylsilyl]-2-O-[(1S,3S,3aS)-tetrahydro-3-[(phenylsulfonyl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-β-D-ribofuranosyl]-

2,4(1H,3H)-Pyrimidinedione, 3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-O-[(1,1-dimethylethyl)dimethylsilyl]-3-O-[(1S,3S,3aS)-tetrahydro-3-[(phenylsulfonyl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-β-D-ribofuranosyl]-

2,4(1H,3H)-Pyrimidinedione, 3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-3-O-[(1R,3R,3aR)-tetrahydro-3-[(phenylsulfonyl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-β-D-erythro-pentofuranosyl]-

Methanimidamide, N′-[1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-3-O-[(1S,3S,3aS)-tetrahydro-3-[(phenylsulfonyl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-β-D-erythro-pentofuranosyl]-1,4-dihydro-5-methyl-4-oxo-2-pyrimidinyl]-N,N-dimethyl-, (1E)-

Methanimidamide, N′-[1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-1,4-dihydro-5-methyl-4-oxo-2-pyrimidinyl]-N,N-dimethyl-, (1E)-

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-7,8-dihydro-8-thioxo-3′-O-[(1S,3S,3aS)-tetrahydro-3-[(phenylsulfonyl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-

Benzamide, N-[7-benzoyl-9-[2-O-benzoyl-5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[(1S,3S,3aS)-tetrahydro-3-[(phenylsulfonyl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-β-D-arabinofuranosyl]-8,9-dihydro-8-oxo-7H-purin-6-yl]-

2(1H)-Pyrimidinone, 1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-3-O-[(1S,3S,3aS)-tetrahydro-3-[(phenylsulfonyl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-β-D-erythro-pentofuranosyl]-3,6-dihydro-6-thioxo-

2(1H)-Pyrimidinone, 1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-3,6-dihydro-6-thioxo-

Adenosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-7,8-dihydro-8-oxo-N-[(phenylamino)carbonyl]-3′-O-[(1S,3S,3aS)-tetrahydro-3-[(phenylsulfonyl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-

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

2,4(1H,3H)-Pyrimidinedione, 3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-3-O-[(1S,3S,3aS)-tetrahydro-3-[(phenylsulfonyl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-β-D-erythro-pentofuranosyl]-5-bromo-

2,4(1H,3H)-Pyrimidinedione, 3-[2-O-acetyl-5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[(1S,3S,3aS)-tetrahydro-3-[(phenylsulfonyl)methyl]-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]-β-D-arabinofuranosyl]-

2(1H)-Pyrimidinone, 1-[3,5-bis-O-(4-chlorobenzoyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3,6-dihydro-6-thioxo-