racivir racivir racivir is an experimental nucleoside reverse transcriptase inhibitor (nrti), developed by pharmasset for the treatment of hiv. it is the enantiomer of emtricitabine, a widely used nrti, meaning that the two compounds are mirror images of each other. emtricitabine, the enantiomer of racivir and a widely used nrti racivirclinical dataroutes ofadministrationinvestigationalatc codenoneidentifiers iupac name 4-amino-5-fluoro-1--1,2-dihydropyrimidin-2-one cas number137530-41-7pubchem cid454858chemspider400521unii9pdn1v466aniaid chemdb005245chemical and physical dataformulac8h10fn3o3smolar mass247.24 g·mol−13d model (jsmol)interactive image smiles c1c(c(nc(=o)n12cs(o2)co)n)f inchi inchi=1s/c8h10fn3o3s/c9-4-1-12(8(14)11-7(4)10)5-3-16-6(2-13)15-5/h1,5-6,13h,2-3h2,(h2,10,11,14)/t5-,6+/m1/s1key:xqspynmvsikcoc-ritpcoansa-n