1-[(5R,6R,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2-oxo-1,7-dioxa-3-azaspiro[4.4]non-3-en-8-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

Guanosine, 2′-deoxy-6-O-(2,5-dichlorophenyl)-N-(2-methyl-1-oxopropyl)-, 3′-(4-oxopentanoate)

Uridine, 5-[2-(7-amino-9H-fluoren-2-yl)ethynyl]-2′-deoxy-

Uridine, 2′-deoxy-5-[2-[7-(dimethylamino)-9H-fluoren-2-yl]ethynyl]-

Uridine, 2′-deoxy-5-[2-[7-[(2,2,2-trifluoroacetyl)amino]-9H-fluoren-2-yl]ethynyl]-

(1S)-1-Methyl-2-(1-methylethoxy)-2-oxoethyl phenyl [P(S)]-2′-deoxy-2′,2′,5-trifluoro-N-(1-oxo-2-propylpentyl)-5′-cytidylate

(1S)-1-Methyl-2-(1-methylethoxy)-2-oxoethyl phenyl [P(S)]-N-benzoyl-2′-deoxy-2′,2′,5-trifluoro-5′-cytidylate

(1S)-1-Methyl-2-(1-methylethoxy)-2-oxoethyl phenyl [P(R)]-2′-deoxy-2′,2′,5-trifluoro-N-(1-oxo-2-propylpentyl)-5′-cytidylate

(1S)-1-Methyl-2-(1-methylethoxy)-2-oxoethyl phenyl [P(R)]-N-benzoyl-2′-deoxy-2′,2′,5-trifluoro-5′-cytidylate

5-Pyrimidinepropanoic acid, α-[[(aminocarbonyl)(2-deoxy-3-O-phosphono-β-D-erythro-pentofuranosyl)amino]methyl]-1-(2-deoxy-β-D-erythro-pentofuranosyl)-1,2,3,4-tetrahydro-α-methyl-2,4-dioxo-, cyclic 3′→5′′-ester, (αR)-

5′-Thymidylic acid, α-[(5R)-1-(2-deoxy-β-D-erythro-pentofuranosyl)hexahydro-4,4-dihydroxy-5-methyl-2-oxo-5-pyrimidinyl]-, intramol. 5′→3′′′-ester