(2S)-isopropyl 2-(((((2R,3R,4R,5R)-5- (2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-fluoro-3-hydroxy-4-methyltetrahydrofuran-2-yl)m ethoxy)(phenoxy)phosphoryl)amino)propanoate,(2S)-isopropyl 2-(((((2R,3R,4R,5R)-5- (2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-fluoro-3-hydroxy-4-methyltetrahydrofuran-2-yl)m ethoxy)(phenoxy)phosphoryl)amino)propanoate,SOFOSBUVIR is a uridine monophosphate analog inhibitor of HEPATITIS C VIRUS (HCV) polymerase NS5B that is used as an ANTIVIRAL AGENT in the treatment of CHRONIC HEPATITIS C,Sofosbuvir API