L-Alanine, N-[(S)-hydroxyphenoxyphosphinyl]-, 1-methylethyl ester, 5′-ester with 2′-deoxy-2′-fluoro-N-[(2-methyl-4-pyrimidinyl)carbonyl]cytidine

2′-Deoxy-2′-fluoro-N-[(6-methoxy-3-pyridinyl)carbonyl]cytidine

2′-Deoxy-2′-fluoro-N-[(6-fluoro-3-pyridinyl)carbonyl]cytidine

2′-Deoxy-2′-fluoro-N-[[6-(trifluoromethyl)-3-pyridinyl]carbonyl]cytidine

2′-Deoxy-2′-fluoro-N-[[2-methyl-6-(trifluoromethyl)-3-pyridinyl]carbonyl]cytidine

2′-Deoxy-2′-fluoro-N-[(5-methoxy-2-pyridinyl)carbonyl]cytidine

2′-Deoxy-2′-fluoro-N-[(5-methyl-2-pyridinyl)carbonyl]cytidine

N-[(5-Cyano-2-pyridinyl)carbonyl]-2′-deoxy-2′-fluorocytidine

2′-Deoxy-2′-fluoro-N-(4-pyrimidinylcarbonyl)cytidine

2′-Deoxy-2′-fluoro-N-[(5-fluoro-2-pyridinyl)carbonyl]cytidine

2′-Deoxy-2′-fluoro-N-[(6-methyl-2-pyrazinyl)carbonyl]cytidine

2′-Deoxy-2′-fluoro-N-(3-pyridazinylcarbonyl)cytidine

2′-Deoxy-2′-fluoro-N-[(6-methyl-3-pyridinyl)carbonyl]cytidine

N-[(5-Amino-2-pyridinyl)carbonyl]-2′-deoxy-2′-fluorocytidine

2′-Deoxy-2′-fluoro-N-[(5-nitro-2-pyridinyl)carbonyl]cytidine

2′-Deoxy-2′-fluoro-N-[(2-methyl-4-pyrimidinyl)carbonyl]cytidine

2′-Deoxy-2′-fluoro-N-[(5-phenyl-2-pyridinyl)carbonyl]cytidine