3′,5′-Bis-O -[(1,1-dimethylethyl)dimethylsilyl]- 2′-O -methylguanosine

N -[(1,1-Dimethylethoxy)carbonyl]-N -methyl-S - (triphenylmethyl)-L-cysteine

Uridine, 2′-deoxy-5-(2-phenylethynyl)-, 3′,5′- diacetate

(2R,3R,3aS,9aR)-3-(benzyloxy)-2-((benzyloxy)methyl)-2,3,3a,9a-tetrahydro-6H-furo[2',3':4,5]oxazolo[3,2-a]pyrimidin-6-one

5'-O-DMTr-N2-isobutyrylguanosine

1-[3,5-Bis-O -(phenylmethyl)-β-D-arabinof uranosyl]-2,4(1H ,3H )-pyrimidinedione

5-Deoxy-1-O,2-O-isopropylidene-3-O,6-O-dibenzoyl-α-D-ribo-hexofuranose

((2R,3R,4R,5R)-3-acetoxy-5-(6-amino-9H-purin-9-yl)-4-fluorotetrahydrofuran-2-yl)methyl acetate

β-D-Ribofuranose, 3,5-bis-O -(phenylmethyl)-, 1,2-diacetate

D-Ribofuranose, 3,5-bis-O -(phenylmethyl)-, 1, 2-diacetate

2-Deoxy-2-fluoro-β-D-glucose

2'-Deoxy-2'-fluoro-5-methylcytidine

2'-Fluorothymidine

4'-Azidocytidine

Cytarabine Impurity 12

4'-Ethynyl-2-Fluoro-2'-Deoxyadenosine

5,6-Dihydro-5-azacytidine

4-Thiouridine

5'-Cytidylic acid

5-Fluoro-2-methoxynicotinonitrile