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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

N-[2′-C-(Hydroxymethyl)-P-1-naphthalenyl-5′-uridylyl]-L-alanine 2-methylpropyl ester

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

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