2S-isopropyl-5R-methyl-1R-cyclohexyl (2R, 5S)-5-(4-amino-2-oxo-2H-pyrimidin-1-yl)-[1.3]-oxathiolane-2-carboxylate
2S-isopropyl-5R-methyl-1R-cyclohexyl (2R,5S)-5-(4-amino-2-oxo-2H-pyrimidin-1-yl)-[1,3]-oxathiolane-2-carboxylate