Cytidine, 5′-deoxy-5-ethynyl-N-[(2-methoxyethoxy)carbonyl]-

Cytidine, N-[(cyclopentylmethoxy)carbonyl]-5′-deoxy-5-ethynyl-

Cytidine, N-[(cyclobutylmethoxy)carbonyl]-5′-deoxy-5-ethynyl-

Cytidine, N-[(cyclopropylmethoxy)carbonyl]-5′-deoxy-5-ethynyl-

Cytidine, N-[(cyclobutyloxy)carbonyl]-5′-deoxy-5-ethynyl-

Cytidine, 5′-deoxy-N-[(3-methoxy-2,2-dimethylpropoxy)carbonyl]-5-[(trimethylsilyl)ethynyl]-, 2′,3′-diacetate

Cytidine, 5′-deoxy-5-ethynyl-N-[(3-methoxy-2,2-dimethylpropoxy)carbonyl]-

Cytidine, 5′-deoxy-5-[(trimethylsilyl)ethynyl]-, 2′,3′-diacetate

2′-Deoxyguanylyl-(3′→5′)-thymidine

Guanosine 5′-(tetrahydrogen triphosphate), 2′-(dihydrogen phosphate)

Cytidine 5′-(tetrahydrogen triphosphate), 3′-(dihydrogen phosphate)

Uridine 5′-(tetrahydrogen triphosphate), 2′-(dihydrogen phosphate)

(3aR,4R,13R,13aR)-3a,4,13,13a-Tetrahydro-2,2-dimethyl-4,13-epoxy-5H-1,3-dioxolo[5,6][1,3]oxazocino[3,2-e]purin-8(9H)-one