5-BroMo-2'-deoxy-2'-fluoro-3',5'-di-O-acetyl uridine

(2'R)-2'-Deoxy-6-O-ethyl-2'-fluoro-2'-methylguanosine

[2-(6-Amino-9H-purin-9-yl)ethanol-d4

p-tolyl 1-thio-β-D-ribofuranoside