(1R,2S,5R)-2-isopropyl-5-methylcyclohexyl (2R,5S)-5-(4-amino-2-oxo-1,2-dihydro-1-pyrimidinyl)-1,3-oxathiolane-2-carboxylate
(1R,2S,5R)-2-isopropyl-5-methylcyclohexyl (2R,5R)-5-(4-amino-2-oxo-1,2-dihydro-1-pyrimidinyl)-1,3-oxathiolane-2-carboxylate
(1'S,2'R,5'S)-Menthyl 5(R)-cytosin-1''-yl-1,3-oxathiolane-2(S)-carboxylate
(1'S,2'R,5'S)-Menthyl 5(R)-cytosin-1''-yl-1,3-oxathiolane-2(S)-carboxylate