.alpha.-L-(+)-(2R,5R)-1-[2-(Hydroxymethyl)-1,3-oxathiolan-5-yl]uracil .alpha.-L-Oxathiolanyl uridine 145986-08-9 2,4(1H,3H)-Pyrimidinedione, 1-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl]-, (2R-trans)- 2-OHMe-1,3-OxathiolanU AIDS-004769 AIDS004769