Sofosbuvir L-Alanine, N-[(S)-hydroxyphenoxyphosphinyl]-, 1-Methylethyl ester, (P→3'),(P'→5')-diester with (2'R)-2'-deoxy-2'-fluoro-2'-Methyluridine sofosBuvir impurity 49 sofosBuvir impurity 36 Sofosbuvir Impurity22 Sofosbuvir Impurity27 (2R,3R,4R,5S)-5-(4-benzaMido-2-oxopyriMidin-1(2H)-yl)-2-((benzoyloxy)Methyl)-4-fluoro-4-Methyltetrahydrofuran-3-yl benzoate 1-((2R,3S,4R,5R)-3,4-dihydroxy-5-(hydroxyMethyl)-3-Methyltetrahydrofuran-2-yl)pyriMidine-2,4(1H,3H)-dione Sofosbuvir impurity D ((2R,3R,4R)-3-(benzoyloxy)-4-fluoro-4-methyl-5-oxotetrahydrofuran-2-yl)methyl benzoate N-[(S)-(2,3,4,5,6-pentafluorophenoxy)phenoxyphosphinyl]-L-alanine 1-Methylethyl ester SofosBuvir Impurity 2 SofosBuvir Impurity 18 SofosBuvir Impurity 14 SofosBuvir Impurity 52 SofosBuvir Impurity 55 SofosBuvir Impurity 50 Sofosbuvir Impurity P