N,N′-(4′-C-Fluoro-2′-C-methyl-5′-uridylylidene)bis[alanine] 1,1′-bis(1-methylethyl) ester

N-[(2′R)-P-(4-Chlorophenyl)-2′-deoxy-2′-ethynyl-2′-C-fluoro-5′-uridylyl]-L-alanine 1-methylethyl ester

N-(4′-C-Fluoro-2′-C-methyl-5′-uridylyl)alanine

Valine, 3′-ester with 4′-C-(chloromethyl)-2′-deoxy-2′-fluorocytidine

N-[4′-C-(Azidomethyl)-2′-deoxy-2′-fluoro-P-[2-[3-(1-methylethoxy)-3-oxopropyl]phenyl]-5′-cytidylyl]alanine 1-methylethyl ester

(2,2-Dimethyl-1-oxopropoxy)methyl (2-methyl-1-oxopropoxy)methyl 4′-C-(azidomethyl)-2′-deoxy-2′-fluoro-5′-cytidylate

Valine, 3′-ester with 4′-C-(azidomethyl)-2′-deoxy-2′-fluorocytidine

N-[4′-C-(Azidomethyl)-2′-deoxy-2′-fluoro-P-[2-[(3-hydroxy-2,2-dimethyl-1-oxopropyl)thio]ethyl]-3′-O-[(4-methoxyphenyl)diphenylmethyl]-5′-uridylyl]alanine 1-methylethyl ester

N,N′-[4′-C-(Azidomethyl)-2′-deoxy-2′-fluoro-5′-uridylylidene]bis[alanine] 1,1′-bis(1-methylethyl) ester

Valine, 5′-ester with 4′-C-(azidomethyl)-2′-deoxy-2′-fluorocytidine

N-[P-(4-Chlorophenyl)-4′-C-fluoro-2′-C-methyl-5′-uridylyl]alanine 1-methylethyl ester

N-(4′-C-Fluoro-2′-C-methyl-P-1-naphthalenyl-5′-uridylyl)alanine 1-methylethyl ester

N-[3′-O-Acetyl-P-(4-chlorophenyl)-4′-C-fluoro-2′-C-methyl-5′-uridylyl]alanine 1-methylethyl ester

N-[4′-C-(Azidomethyl)-2′-deoxy-2′-fluoro-P-phenyl-5′-uridylyl]alanine 1-methylethyl ester

N-[[P(S),2′R]-2′-Deoxy-6-O-ethyl-2′-ethynyl-2′-fluoro-4′-C-fluoro-P-phenyl-5′-guanylyl]alanine cyclohexyl ester

N-[[P(R),2′R]-2′-Deoxy-6-O-ethyl-2′-ethynyl-2′-fluoro-4′-C-fluoro-P-phenyl-5′-guanylyl]alanine cyclohexyl ester

N-[[P(R)]-6-O-Ethyl-2′-C-ethynyl-4′-C-fluoro-P-phenyl-5′-guanylyl]alanine cyclohexyl ester

N-[[P(S),2′R]-2′-Deoxy-6-O-ethyl-2′-fluoro-4′-C-fluoro-2′-methyl-P-phenyl-5′-guanylyl]alanine cyclohexyl ester

N-(3′-Deoxy-6-O-ethyl-3′-fluoro-4′-C-fluoro-N-formyl-2′-C-methyl-P-phenyl-5′-guanylyl)alanine cyclohexyl ester

N-[[P(R),2′R]-2′-Deoxy-6-O-ethyl-2′-fluoro-4′-C-fluoro-2′-methyl-P-phenyl-5′-guanylyl]alanine cyclohexyl ester