Enocitabine is a nucleoside analog. Enocitabine inhibits the replication of human cytomegalovirus(HCMV) and it also has antileukemic and antiviral activities.

2′-Deoxy-2′-fluoroguanosine is a nucleoside analog that potently inhibits influenza virus A and B strains(EC90 <0.35 μM). 2'-Deoxy-2'-fluoroguanosine is an inhibitor of influenza virus replication in the upper respiratory tract, improving fever and nasal inflammation.

Ara-G is a deoxyguanosine (GdR) analog and a nucleoside analogue that is rapidly converted by cells of the T lymphoid lineage to its corresponding arabinosylguanine nucleotide triphosphate (araGTP), resulting in inhibition of DNA synthesis and selective in vitro toxicity to T lymphoblastoid cell lines as well as to freshly isolated leukemia cells from patients with T cell acute lymphoblastic leukemia (ALL).