Benzoic acid (2R,5S)-5-(4-amino-2-oxo-2H-pyrimidin-1-yl)-[1,3]oxathiolan-2-ylmethyl ester

(1R,2S,5R)-2-isopropyl-5-methylcyclohexyl (2R,5S)-5-[4-(methylcarboxamido)-2-oxo-1,2-dihydro-1-pyrimidinyl]-1,3-oxathiolane-2-carboxylate

(2R,5S)-5-(N-4-propionylcytosin-1-yl)-1,3-oxathiolane-2R-carboxylic acid (1'R,2'S,5'R)-menthyl ester

4-amino-1-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl]pyrimidin-2-one

cis/trans-2-benzoyloxymethyl-5-(cytosin-1'-yl)-1,3-oxathiolane