3'-Amino-2',3'-dideoxythymidine

3'-Amino-2',3'-dideoxy-2'-fluoro-5-methyluridine

2'-Deoxy-5-ethyl-4-thiouridine

2'-Deoxy-5-methylcytidinehydrochloride

2-Phenylamino Adenosine

5-[3-[(3-Amino-1-oxo-propyl)amino]-1-propynyl]-2'-deoxyuridine

8-(4-Chlorophenylthio)guanosine 3',5'-cyclic Monophosphate . triethylammonium salt

2'-Deoxy-5-[3-[[N-[6-[[3',6'-dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-5(or6)-yl)carbonyl]amino]-1-oxohexyl]glycylglycyl-L-leucyl-β-alanyl]-amino]-1-propenyl]-tetralithiumsalturidine

2'-O-Ethylcytidine

4-Amino-6-hydroxy-2-mercapto-5-nitrosopyrimidine ammonium salt

2'-O-(2-Methoxyethyl)inosine

2'-O-methyl-5-(phenylethynyl)uridine

5-[(4-Methoxyphenyl)ethynyl]-2'-O-methyluridine

8-Ethoxy-Adenosine

2'-Chloro-2'-deoxy-5-methyluridine

8-Hydroxymethylguanosine

2,3,5-Tri-O-benzyl-D-ribonolactone

2'-Deoxy-6-S-(1-methylethyl)-6-thioGuanosine

2'-Deoxy-6-S-[(4-methoxyphenyl)methyl]-6-thioGuanosine

5-[(1E)-2-bromoethenyl]-2'-deoxy-4-thiouridine

2'-Deoxy-3'-[(phenylmethyl)amino]Guanosine