Sofosbuvir (2R)-Methyl Impurity ; Propan-2-yl N-[(S)-{[(2R,3R,4R,5R)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-fluoro-3-hydroxy-4- methyloxolan-2-yl]methoxy}phenoxyphosphoryl]-D-alaninate ; CAS # 1496552-28-3 ;

1-((2R,4S,5R)-4-(Benzyloxy)-3-fluoro-5-(hydroxymethyl)-3-methyl-tetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione ;

1-((2R,4S,5R)-5-(Benzyloxymethyl)-3-fluoro-4-hydroxy-3-methyl-tetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione ;

Propan-2-yl N-[(S)-{[(2R,3R,4R,5R)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-fluoro-3-hydroxy-4-methyloxolan-2-yl]methoxy}phenoxyphosphoryl]-L-alaninate ; CAS # 1190307-88-0 ;

Isopropyl (2S)-2-[[[(2R,3R,4R,5S)-5-(2,4-dioxopyrimidin-1-yl)-4-fluoro-3-hydroxy-4-methyl-tetrahydrofuran-2-yl]methoxy-phenoxy-phosphoryl] amino] propanoate ;

(2R,3R,4S,5R)-5-(4-Benzamido-2-oxopyrimidin-1(2H)-yl)-2-((benzoyloxy)methyl)-4-hydroxy-4-methyltetrahydrofuran-3-yl benzoate ; CAS # 863329-62-8 ;

((2R,3S,5R)-5-(2,4-Dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-fluoro-3-hydroxy-4-methyl-tetrahydrofuran-2-yl)methyl phenyl hydrogen phosphate ;

[(2R,3R,4R,5S)-5-(2,4-dioxopyrimidin-1-yl)-4-fluoro-3-hydroxy-4-methyl-tetrahydrofuran-2-yl]methanol ;

1-((2R,4S,5R)-3-Chloro-4-hydroxy-5-(hydroxymethyl)-3-methyl-tetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione ; CAS # 1496551-72-4 ;

(2R,3R,4S,5S)-5-(4-Amino-2-oxopyrimidin-1(2H)-yl)-2-((benzoyloxy)methyl)-4-fluoro-4-methyltetrahydrofuran-3-yl benzoate ; CAS # 874638-94-5 ;

((2R,3R,4S,5R)-3-(Benzoyloxy)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-hydroxy-4-methyltetrahydrofuran-2-yl)methyl benzoate ; CAS # 944476-44-2 ;

((2S,3S,4R)-3-(Benzoyloxy)-4-fluoro-4-methyl-5-oxotetrahydrofuran-2-yl)methyl benzoate ; CAS # 1157884-58-6 ;

Sofosbuvir (R)-Phosphate ; Sofosbuvir Rp-Isomer ; Propan-2-yl N-[(R)-{[(2R,3R,4R,5R)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-fluoro-3-hydroxy-4-methyloxolan-2-yl]methoxy}phenoxyphosphoryl]-L-alaninate ; CAS # 1190308-01-0 ;

Sofosbuvir Chloro Analog ; Desfluoro Chloro Sofosbuvir ; Propan-2-yl N-[(S)-{[(2R,3R,4R,5R)-4-chloro-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-3-hydroxy-4-methyloxolan-2-yl]methoxy}phenoxyphosphoryl]-L-alaninate ; CAS # 1496552-51-2 ;

Bis(propan-2-yl) P,P'-[(2'R)-2'-deoxy-2'-fluoro-2'-methyluridine-3'O,5'O-diyl]-P,P'-diphenoxybis[(S)-N-phosphoryl-L-alininate] ;

Sofosbuvir Desphosphate Impurity ; Fluorouridine ; Sofosbuvir Metabolite GS331007 ; [(2R,3R,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-4-fluoro-3-hydroxy-4-methyl-tetrahydrofuran-2-yl]methanol ; CAS # 863329-66-2 ;

Sofosbuvir Ethyl Analog ; Sofosbuvir O-Desisopropyl O-Ethyl Ester ; (2S)-Ethyl 2-(((((2R,3R,4R,5R)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-fluoro-3-hydroxy-4-methyltetrahydrofuran-2-yl)methoxy)(phenoxy)phosphoryl)amino)propanoate ; CAS # 1064684-30-

Perfluorophenol ; 2,3,4,5,6-Pentafluorophenol ; CAS # 771-61-9 ;

N-[(S)-(2,3,4,5,6-Pentafluorophenoxy)phenoxyphosphinyl]-L-alanine 1-methylethyl ester ; CAS # 1334513-02-8 ;

1-((2R,3S,4R,5R)-3,4-Dihydroxy-5-(hydroxymethyl)-3-methyltetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione ; CAS # 114262-49-6 ;

(2R,3S,5R)-5-(4-Benzamido-2-oxopyrimidin-1(2H)-yl)-2-((benzoyloxy)methyl)-4-methylenetetrahydrofuran-3-yl benzoate ; N-Benzoyl-2’-deoxy-2’-methylenecytidine 3’,5’-Dibenzoate ; CAS # 863329-63-9 ;

(2S)-2-[[[(2R,3R,4R,5R)-5-(2,4-Dioxopyrimidin-1-yl)-4-fluoro-3-hydroxy-4-methyl-tetrahydrofuran-2-yl]methoxy-phenoxy-phosphoryl] amino] propanoic acid ;

(2S)-2-[[[(2R,3R,4R,5R)-5-(2,4-Dioxopyrimidin-1-yl)-4-fluoro-3-hydroxy-4-methyl-tetrahydrofuran-2-yl]methoxy-hydroxy-phosphoryl] amino] propanoic acid ammonium salt ; CAS # 1233335-78-8 (acid) ;

PSI 7672 ; (2S)-Methyl 2-(((((2R,3R,4R,5R)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-fluoro-3-hydroxy-4-methyltetrahydrofuran-2-yl)methoxy)(phenoxy)phosphoryl)amino)propanoate ; CAS # 1015255-46-5 ;

Isopropyl (2S)-2-[[[(2R,3R,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-4-fluoro-3-hydroxy-4-methyl-tetrahydrofuran-2-yl]methoxy-hydroxy-phosphoryl] amino] propanoate ; CAS # 1233335-82-4 ;

Sofosbuvir Phosphate Impurity ; Isopropyl N-(Hydroxyphenoxyphosphinyl)alaninate sodium salt ; CAS # 1520010-86-9 (acid) ;

Sofosbuvir Phosphate Impurity (NH4 Salt) ; PSI-7411 Ammonium Salt ; Fluoro Uridine Phosphate (NH4 Salt) ; ((2R,3S,5R)-5-(2,4-Dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-fluoro-3-hydroxy-4-methyl-tetrahydrofuran-2-yl)methyl dihydrogen phosphate ammonium salt ;