N-[2′-Deoxy-N-[(3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-7-yl)carbonyl]-2′,2′-difluoro-P-phenyl-5′-cytidylyl]-L-alanine 1-methylethyl ester

N-[2′-Deoxy-N-[(2,3-dihydro-2-methyl-6-benzofuranyl)carbonyl]-2′,2′-difluoro-P-phenyl-5′-cytidylyl]-L-alanine 1-methylethyl ester

N-[2′-Deoxy-N-[(3,4-dihydro-2-methyl-2H-1-benzopyran-7-yl)carbonyl]-2′,2′-difluoro-P-phenyl-5′-cytidylyl]-L-alanine 1-methylethyl ester

N-[2′-Deoxy-N-[(2,3-dihydro-1H-inden-5-yl)carbonyl]-2′,2′-difluoro-P-phenyl-5′-cytidylyl]-L-alanine 1-methylethyl ester

N-[2′-Deoxy-2′,2′-difluoro-P-phenyl-N-[(5,6,7,8-tetrahydro-2-naphthalenyl)carbonyl]-5′-cytidylyl]-L-alanine 1-methylethyl ester

L-Alanine, N-(hydroxyphenoxyphosphinyl)-, 1-methylethyl ester, 5′-ester with 5-[[[1-(2-deoxy-2,2-difluoro-β-D-erythro-pentofuranosyl)-1,2-dihydro-2-oxo-4-pyrimidinyl]amino]carbonyl]-1,3-benzodioxole-2-carboxylic acid

N-[2′-Deoxy-2′,2′-difluoro-N-(spiro[1,3-benzodioxole-2,1′-cyclopropan]-5-ylcarbonyl)-P-phenyl-5′-cytidylyl]-L-alanine 1-methylethyl ester

L-Alanine, N-(hydroxyphenoxyphosphinyl)-, 1-methylethyl ester, 5′-ester with 7-[[[1-(2-deoxy-2,2-difluoro-β-D-erythro-pentofuranosyl)-1,2-dihydro-2-oxo-4-pyrimidinyl]amino]carbonyl]-2,3-dihydro-1,4-benzodioxin-2-carboxylic acid

N-[2′-Deoxy-N-[(2,2-dimethyl-1,3-benzodioxol-5-yl)carbonyl]-2′,2′-difluoro-P-phenyl-5′-cytidylyl]-L-alanine 1-methylethyl ester

N-[2′-Deoxy-N-[(2,3-dihydro-3,3-dimethyl-1,4-benzodioxin-6-yl)carbonyl]-2′,2′-difluoro-P-phenyl-5′-cytidylyl]-L-alanine

N-[2′-Deoxy-2′,2′-difluoro-N-[(2-methyl-1,3-benzodioxol-5-yl)carbonyl]-P-phenyl-5′-cytidylyl]-L-alanine 1-methylethyl ester

N-[2′-Deoxy-N-[(2,3-dihydro-3-methyl-1,4-benzodioxin-6-yl)carbonyl]-2′,2′-difluoro-P-phenyl-5′-cytidylyl]-L-alanine 1-methylethyl ester

N-[2′-Deoxy-N-(3,5-dichlorobenzoyl)-2′,2′-difluoro-P-phenyl-5′-cytidylyl]-L-alanine 1-methylethyl ester

N-[2′-Deoxy-N-(2,6-dimethoxybenzoyl)-2′,2′-difluoro-P-phenyl-5′-cytidylyl]-L-alanine 1-methylethyl ester

N-[2′-Deoxy-2′,2′-difluoro-P-phenyl-N-(2,3,4-trimethoxybenzoyl)-5′-cytidylyl]-L-alanine 1-methylethyl ester

N-[2′-Deoxy-2′,2′-difluoro-P-phenyl-N-(2,4,6-trimethoxybenzoyl)-5′-cytidylyl]-L-alanine 1-methylethyl ester

N-[2′-Deoxy-N-(3,5-dichloro-4-methoxybenzoyl)-2′,2′-difluoro-P-phenyl-5′-cytidylyl]-L-alanine 1-methylethyl ester

N-[N-(4-Chloro-3,5-dimethoxybenzoyl)-2′-deoxy-2′,2′-difluoro-P-phenyl-5′-cytidylyl]-L-alanine 1-methylethyl ester

N-[N-(3-Chloro-4,5-dimethoxybenzoyl)-2′-deoxy-2′,2′-difluoro-P-phenyl-5′-cytidylyl]-L-alanine 1-methylethyl ester

N-[2′-Deoxy-2′,2′-difluoro-P-phenyl-N-(2,4,5-trimethoxybenzoyl)-5′-cytidylyl]-L-alanine 1-methylethyl ester