Valganciclovir HCl is the L-valyl ester of ganciclovir, is a prodrug for ganciclovir with antiviral activity used to treat cytomegalovirus infections.

Tubercidin, obtained from Streptomyces tubercidicus, is an adenosine analogue, is a nucleoside antibiotic. Also exhibits antifungal and antiviral activities.

5-Fluorocytosine is an antimycotic prodrug which can be converted to 5-fluorouracil, working by inhibiting DNA and RNA synthesis and interfering with ribosomal protein synthesis. It shows both antifungal and antitumor activity.

Cordycepin is a nucleoside adenosine derivative that acts as an anticancer and antifungal agent. Cordycepin inhibits growth of various tumor cells in vitro. It can be converted to 3'-deoxyadenosine triphosphate (3'-dATP), which inhibits ATP-dependent DNA synthesis. Cordycepin is also useful for the study of messenger RNA transcription.

Triacetyl-ganciclovir is an anlogue of ganciclovir, which may be used for analytical studies of Ganciclovir.

5-Azacytidine is a nucleoside analogue of cytidine that specifically inhibits DNA methylation by trapping DNA methyltransferases.

Ganciclovir is a potent inhibitor of viruses of the herpes family, working as a competitive inhibitor of deoxyguanosine triphosphate (dGTP) incorporation into DNA and preferentially inhibits viral DNA polymerases more than cellular DNA polymerases.