((1S)-1-((2S,4R,5R)-5-(5-amino-2-oxo-(1,3)thiazolo(4,5-d)pyrimidin-3-yl)-4-hydroxyoxolan-2-yl)propyl)acetate
((1s)-1-((2s,4r,5r)-5-(5-amino-2-oxo-(1,3)thiazolo(4,5-d)pyrimidin-3-yl)-4-hydroxyoxolan-2-yl)propyl)acetate