2-[(2R)-2-Deoxy-2-fluoro-2-(3-fluoro-1-propyn-1-yl)-5-O-[(S)-[(1S)-1-methyl-2-(1-methylethoxy)-2-oxoethoxy]phenoxyphosphinyl]-β-D-erythro-pentofuranosyl]-1,2,4-triazine-3,5(2H,4H)-dione

1-[(2R)-2-Deoxy-2-fluoro-2-(3-fluoro-1-propyn-1-yl)-5-O-[(S)-[(1S)-1-methyl-2-(1-methylethoxy)-2-oxoethoxy]phenoxyphosphinyl]-β-D-erythro-pentofuranosyl]-1,3,5-triazine-2,4(1H,3H)-dione

N-[[P(S),2′R]-2′-Deoxy-2′-fluoro-2′-(3-fluoro-1-propyn-1-yl)-P-phenyl-5′-uridylyl]-L-alanine 1-methylethyl ester

2-[(2R)-2-Deoxy-2-fluoro-5-O-[(S)-[(1S)-1-methyl-2-(1-methylethoxy)-2-oxoethoxy]phenoxyphosphinyl]-2-(1-propyn-1-yl)-β-D-erythro-pentofuranosyl]-1,2,4-triazine-3,5(2H,4H)-dione

1-[(2R)-2-Deoxy-2-fluoro-5-O-[(S)-[(1S)-1-methyl-2-(1-methylethoxy)-2-oxoethoxy]phenoxyphosphinyl]-2-(1-propyn-1-yl)-β-D-erythro-pentofuranosyl]-1,3,5-triazine-2,4(1H,3H)-dione

2-[(2R)-2-(2-Chloroethynyl)-2-deoxy-2-fluoro-5-O-[(S)-[(1S)-1-methyl-2-(1-methylethoxy)-2-oxoethoxy]phenoxyphosphinyl]-β-D-erythro-pentofuranosyl]-1,2,4-triazine-3,5(2H,4H)-dione

1-[(2R)-2-(2-Chloroethynyl)-2-deoxy-2-fluoro-5-O-[(S)-[(1S)-1-methyl-2-(1-methylethoxy)-2-oxoethoxy]phenoxyphosphinyl]-β-D-erythro-pentofuranosyl]-1,3,5-triazine-2,4(1H,3H)-dione

2-[(2R)-2-Deoxy-2-ethynyl-2-fluoro-5-O-[(S)-[(1S)-1-methyl-2-(1-methylethoxy)-2-oxoethoxy]phenoxyphosphinyl]-β-D-erythro-pentofuranosyl]-1,2,4-triazine-3,5(2H,4H)-dione

1-[(2R)-2-Deoxy-2-ethynyl-2-fluoro-5-O-[(S)-[(1S)-1-methyl-2-(1-methylethoxy)-2-oxoethoxy]phenoxyphosphinyl]-β-D-erythro-pentofuranosyl]-1,3,5-triazine-2,4(1H,3H)-dione

2-[2-C-(3-Fluoro-1-propyn-1-yl)-5-O-[(S)-[(1S)-1-methyl-2-(1-methylethoxy)-2-oxoethoxy]phenoxyphosphinyl]-β-D-ribofuranosyl]-1,2,4-triazine-3,5(2H,4H)-dione

1-[2-C-(3-Fluoro-1-propyn-1-yl)-5-O-[(S)-[(1S)-1-methyl-2-(1-methylethoxy)-2-oxoethoxy]phenoxyphosphinyl]-β-D-ribofuranosyl]-1,3,5-triazine-2,4(1H,3H)-dione

2-[5-O-[(S)-[(1S)-1-Methyl-2-(1-methylethoxy)-2-oxoethoxy]phenoxyphosphinyl]-2-C-1-propyn-1-yl-β-D-ribofuranosyl]-1,2,4-triazine-3,5(2H,4H)-dione

1-[5-O-[(S)-[(1S)-1-Methyl-2-(1-methylethoxy)-2-oxoethoxy]phenoxyphosphinyl]-2-C-1-propyn-1-yl-β-D-ribofuranosyl]-1,3,5-triazine-2,4(1H,3H)-dione

2-[2-C-(2-Chloroethynyl)-5-O-[(S)-[(1S)-1-methyl-2-(1-methylethoxy)-2-oxoethoxy]phenoxyphosphinyl]-β-D-ribofuranosyl]-1,2,4-triazine-3,5(2H,4H)-dione