1,1-Dimethylethyl 5-ethynyl-3,6-dihydro-2,6-dioxo-3-(2,3,5-tri-O-acetyl-β-D-arabinofuranosyl)-1(2H)-pyrimidinecarboxylate

Methyl 4-(2-phenylethynyl)-1-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)-1H-pyrazole-3-carboxylate

2'-O-[(1,1-Dimethylethyl)dimethylsilyl]-3'-C-ethynylcytidine

2',5'-Bis-O-[(1,1-dimethylethyl)dimethylsilyl]-3'-C-ethynylcytidine

5'-O-[(1,1-Dimethylethyl)diphenylsilyl]-3'-C-ethynylcytidine

5'-O-[Dimethyl(1,1,2-trimethylpropyl)silyl]-3'-C-ethynylcytidine

5'-O-(Dimethylphenylsilyl)-3'-C-ethynylcytidine

3'-Azido-2',3'-dideoxy-6-thioguanosine 5'-(tetrahydrogen triphosphate)

N-[(1,1-Dimethylethoxy)carbonyl]-5'-O-[(1,1-dimethylethyl)dimethylsilyl]-3'-C-ethynylcytidine

5'-O-[(1,1-Dimethylethyl)dimethylsilyl]-3'-C-ethynyl-N-(1-oxoheptyl)cytidine

2'-O-[Dimethyl(1,1,2-trimethylpropyl)silyl]-3'-C-ethynylcytidine

3'-C-Ethynyl-2'-O-[tris(1-methylethyl)silyl]cytidine

3'-C-Ethynyl-2',5'-bis-O-[tris(1-methylethyl)silyl]cytidine

5-(5-Azidopentyl)-2'-deoxyuridine 5'-(tetrahydrogen triphosphate)

N-[3-[[3-(4-Azido-5-chloro-2-pyridinyl)-1-oxopropyl]amino]-1-propen-1-yl]-2'-deoxyuridine 5'-(tetrahydrogen triphosphate)

2-Amino-8-chloroadenosine 5'-(tetrahydrogen triphosphate)

N-Benzoyl-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-3'-O-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-2'-deoxy-5-methylcytidine

Gougerotin