Racivir is an experimental

nucleoside reverse transcriptase inhibitor Reverse-transcriptase inhibitors (RTIs) are a class of antiretroviral drugs used to treat HIV infection or AIDS, and in some cases hepatitis B. RTIs inhibit activity of reverse transcriptase, a viral DNA polymerase that is required for replication ...

(NRTI), developed by

Pharmasset Pharmasset Inc. was a pharmaceutical company based in Princeton, New Jersey in the United States. The company develops antiviral drugs for HIV (including racivir), hepatitis B (including clevudine, marketed as Levovir), and hepatitis C. In N ...

for the treatment of

HIV The human immunodeficiency viruses (HIV) are two species of ''Lentivirus'' (a subgroup of retrovirus) that infect humans. Over time, they cause acquired immunodeficiency syndrome (AIDS), a condition in which progressive failure of the immune ...

. It is the

enantiomer In chemistry, an enantiomer ( /ɪˈnænti.əmər, ɛ-, -oʊ-/ ''ih-NAN-tee-ə-mər''; from Ancient Greek ἐνάντιος ''(enántios)'' 'opposite', and μέρος ''(méros)'' 'part') – also called optical isomer, antipode, or optical ant ...

emtricitabine Emtricitabine (commonly called FTC, systematic name 2',3'-dideoxy-5-fluoro-3'-thiacytidine), with trade name Emtriva (formerly Coviracil), is a nucleoside reverse-transcriptase inhibitor (NRTI) for the prevention and treatment of HIV infection in ...

, a widely used NRTI, meaning that the two compounds are

mirror image A mirror image (in a plane mirror) is a reflected duplication of an object that appears almost identical, but is reversed in the direction perpendicular to the mirror surface. As an optical effect it results from reflection off from substances ...

s of each other. Emtricitabine skeletal

References

{{Antiretroviral drug Nucleoside analog reverse transcriptase inhibitors Pyrimidones Oxathiolanes Organofluorides Experimental drugs Hydroxymethyl compounds