(2R,5S)-5-(5-Fluoro-3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)-1,3-oxathiolane-2-carboxylic acid (1R,2S,5R)-5-methyl-2-(1-methylethyl)cyclohexyl ester Emtricitabine Impurity 22 (1R,2S,5R)-Menthyl-(2R,5S)-5-(4-amino-2-oxo-2H-pyrimidin-1-yl)-[1,3]oxathiolane-2-carboxylic acid Emtricitabine 5-fluoro-1-(2-(hydroxymethyl)-1,3-dioxolan-4-yl)cytosine Emtricitabine Tenofovir Disoproxil Dimer Emtricitabine Impurity 18 (2S)-2-[[[(1,1-Dimethylethyl)diphenylsilyl]oxy]methyl]-1,3-oxathiolan-5-ol 5-Acetate (+)-NEOMENTHOL Oxathiolan 5fu-.B. EMtricitabine Carboxylic Acid Emtricitabine Impurity 25 Emtricitabine ((2S,5R)-5-(4-amino-5-fluoro-2-oxopyrimidin-1(2H)-yl)-1,3-oxathiolan-2-yl)methyl butyrate(WXC04777) Aids005680 5-epi EMtricitabine Indigo Carmine Emtricitabine Impurity 15