L-Alanine, N-[hydroxy(1-naphthalenyloxy)phosphinyl]-, 2-methylpropyl ester, 5′-ester with 1-[2-deoxy-4-C-fluoro-2-(hydroxymethyl)-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

L-Alanine, N-[hydroxy(1-naphthalenyloxy)phosphinyl]-, 2-methylpropyl ester, 5′-ester with 1-[2-deoxy-2-(hydroxymethyl)-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

N-[(2′R)-2′-Cyano-2′-deoxy-4′-C-fluoro-3′-C-hydroxy-2′-(hydroxymethyl)-P-1-naphthalenyl-5′-uridylyl]-L-alanine 2-methylpropyl ester

N-[(2′R)-2′-Cyano-2′-deoxy-3′-C-hydroxy-2′-(hydroxymethyl)-P-1-naphthalenyl-5′-uridylyl]-L-alanine 2-methylpropyl ester

N-[(2′S)-2′-Cyano-2′-deoxy-4′-C-fluoro-2′-(hydroxymethyl)-P-1-naphthalenyl-5′-uridylyl]-L-alanine 2-methylpropyl ester

N-[(2′S)-2′-Cyano-2′-deoxy-2′-(hydroxymethyl)-P-1-naphthalenyl-5′-uridylyl]-L-alanine 2-methylpropyl ester

N-[(2′S)-2′-Deoxy-2′-fluoro-4′-C-fluoro-3′-C-hydroxy-2′-(hydroxymethyl)-P-1-naphthalenyl-5′-uridylyl]-L-alanine 2-methylpropyl ester

N-[(2′S)-2′-Deoxy-2′-fluoro-3′-C-hydroxy-2′-(hydroxymethyl)-P-1-naphthalenyl-5′-uridylyl]-L-alanine 2-methylpropyl ester

N-[(2′R)-2′-Deoxy-2′-fluoro-4′-C-fluoro-2′-(hydroxymethyl)-P-1-naphthalenyl-5′-uridylyl]-L-alanine 2-methylpropyl ester

N-[(2′R)-2′-Deoxy-2′-fluoro-2′-(hydroxymethyl)-P-1-naphthalenyl-5′-uridylyl]-L-alanine 2-methylpropyl ester

N-[[[(2S,5R)-4,4-Dichloro-5-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)-2-fluorotetrahydro-3,3-dihydroxy-2-furanyl]methoxy](1-naphthalenyloxy)phosphinyl]-L-alanine 2-methylpropyl ester

N-[[[(2R,5R)-4,4-Dichloro-5-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)tetrahydro-3,3-dihydroxy-2-furanyl]methoxy](1-naphthalenyloxy)phosphinyl]-L-alanine 2-methylpropyl ester

N-(2′,2′-Dichloro-2′-deoxy-4′-C-fluoro-P-1-naphthalenyl-5′-uridylyl)-L-alanine 2-methylpropyl ester

N-(2′,2′-Dichloro-2′-deoxy-P-1-naphthalenyl-5′-uridylyl)-L-alanine 2-methylpropyl ester

N-[(2′R)-2′-Chloro-2′-deoxy-2′-fluoro-4′-C-fluoro-3′-C-hydroxy-P-1-naphthalenyl-5′-uridylyl]-L-alanine 2-methylpropyl ester

N-[(2′R)-2′-Chloro-2′-deoxy-2′-fluoro-3′-C-hydroxy-P-1-naphthalenyl-5′-uridylyl]-L-alanine 2-methylpropyl ester

N-[(2′S)-2′-Chloro-2′-deoxy-2′-fluoro-4′-C-fluoro-P-1-naphthalenyl-5′-uridylyl]-L-alanine 2-methylpropyl ester

N-[(2′S)-2′-Chloro-2′-deoxy-2′-fluoro-P-1-naphthalenyl-5′-uridylyl]-L-alanine 2-methylpropyl ester

N-[(2′S)-2′-Chloro-2′-deoxy-2′-fluoro-4′-C-fluoro-3′-C-hydroxy-P-1-naphthalenyl-5′-uridylyl]-D-alanine 2,2-dimethylpropyl ester

N-[(2′S)-2′-Chloro-2′-deoxy-2′-fluoro-3′-C-hydroxy-P-1-naphthalenyl-5′-uridylyl]-D-alanine 2,2-dimethylpropyl ester