(2′R)-N-[2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-2′-(fluoroomethyl)-2′-methyl-5′-cytidylyl]-L-alanine 1-methylethyl ester

(2′R)-N-[[P(S)]-2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-2′-(fluoroomethyl)-2′-methyl-5′-cytidylyl]-D-alanine 1-methylethyl ester

(2′R)-N-[[P(R)]-2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-2′-(fluoroomethyl)-2′-methyl-5′-cytidylyl]-D-alanine 1-methylethyl ester

(2′R)-N-[2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-2′-(fluoroomethyl)-2′-methyl-5′-cytidylyl]-D-alanine 1-methylethyl ester

(2′R)-N-[2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-2′-(fluoroomethyl)-2′-methyl-5′-cytidylyl]alanine 1-methylethyl ester

(2′R)-N-[[P(S)]-2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-5-fluoro-2′-(fluoroomethyl)-2′-methyl-5′-uridylyl]-L-alanine 1-methylethyl ester

(2′R)-N-[[P(R)]-2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-5-fluoro-2′-(fluoroomethyl)-2′-methyl-5′-uridylyl]-L-alanine 1-methylethyl ester

(2′R)-N-[2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-5-fluoro-2′-(fluoroomethyl)-2′-methyl-5′-uridylyl]-L-alanine 1-methylethyl ester

(2′R)-N-[[P(S)]-2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-5-fluoro-2′-(fluoroomethyl)-2′-methyl-5′-uridylyl]-D-alanine 1-methylethyl ester

(2′R)-N-[[P(R)]-2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-5-fluoro-2′-(fluoroomethyl)-2′-methyl-5′-uridylyl]-D-alanine 1-methylethyl ester

(2′R)-N-[2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-5-fluoro-2′-(fluoroomethyl)-2′-methyl-5′-uridylyl]-D-alanine 1-methylethyl ester

(2′R)-N-[2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-5-fluoro-2′-(fluoroomethyl)-2′-methyl-5′-uridylyl]alanine 1-methylethyl ester

(2′R)-N-[[P(S)]-2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-2′-(fluoroomethyl)-2′-methyl-5′-uridylyl]-L-alanine 1-methylethyl ester

(2′R)-N-[[P(R)]-2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-2′-(fluoroomethyl)-2′-methyl-5′-uridylyl]-L-alanine 1-methylethyl ester

(2′R)-N-[2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-2′-(fluoroomethyl)-2′-methyl-5′-uridylyl]-L-alanine 1-methylethyl ester

(2′R)-N-[[P(S)]-2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-2′-(fluoroomethyl)-2′-methyl-5′-uridylyl]-D-alanine 1-methylethyl ester

(2′R)-N-[[P(R)]-2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-2′-(fluoroomethyl)-2′-methyl-5′-uridylyl]-D-alanine 1-methylethyl ester

(2′R)-N-[2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-2′-(fluoroomethyl)-2′-methyl-5′-uridylyl]-D-alanine 1-methylethyl ester

(2′R)-N-[2′-Deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-2′-(fluoroomethyl)-2′-methyl-5′-uridylyl]alanine 1-methylethyl ester

L-Alanine, N-[(S)-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethoxy]hydroxyphosphinyl]-, 1-methylethyl ester, 5′-ester with 7-(2-deoxy-2,2-dimethyl-β-D-erythro-pentofuranosyl)-5-fluoro-7H-pyrrolo[2,3-d]pyrimidin-4-amine