(2R)-2-Deoxy-2-fluoro-2-methyl-D-erythropentonic Acid γ-Lactone 3,5-Dibenzoate is a reactant used in the synthesis of 1''-C-cyano-2''-fluoro-2''-C-methyl pyrimidine nucleosides as HCV polymerase inhibitors.
((2R,3R,4R)-3-(benzoyloxy)-4-fluoro-4-methyl-5-oxotetrahydrofuran-2-yl)methyl benzoate is an impurity of Sofosbuvir. Sofosbuvir is a NS5B inhibtor used for the treatment of hepatitis C. It is only recommended with some combination of ribavirin, peginterferon-alfa, simeprevir, ledipasvir or daclatasvir.