Table 1.

Antiviral and anti-tumor nucleoside drugs currently on the market.

Bioactivities		Drug names
Antiviral	Broad-spectrum antiviral drug	Ribavirin
	Anti-HIV	Zidovudine, Didanosine, Zalcitabine, Stavudine, Lamivudine, Abacavir, Tenofovir, Emtricitabine
	Anti-HBV	Lamivudine, Telbivudine, Adefovir dipivoxil, Emtricitabine, Entecavir, Ttenofovir disoproxil, Clevudine
	Anti-HCV	Sofosbuvir
	Anti-herpes virus	Idoxuridine, Trifluorothymidine, Brivudine, Acyclovir, Valacyclovir, Penciclovir, Famciclovir, Ganciclovir, Formimivir, Cidofovir
	Anti-COVID-19	Remdesivir
Anti-tumor		6-Mercaptopurine, 6-Mercaptoguanine, Fludarabine, Clofarabine, Cladribine, Adenine arabinoside, Nelarabine, Cytarabine, Decitabine, Enocitabine, Troxacitabine, 5-FU, Gemcitabine, Zalcitabine, Capecitabine, CNDAC