2',3',5'-Tri-O-Acetyluridine
2',3',5'-Triacetylguanosine
2',3',5'-Triacetylinosine
2',3'-Dideoxy Cytidine
2',3'-Dideoxy Inosine
2',3'-Dideoxyadenosine
2'-Bromo-2'-Deoxyuridine
2'-Deoxy-2'-Fluoro-Thymidine
2'-Deoxy-2'-Fluoro-Uridine
2,6 - Dichloropurine Riboside
2-Chloroadenosine
2-Deoxy-D-Ribose