(+)-(2S,5R)-1-[2-(Hydroxymethyl)-1,3-oxathiolan-5-yl]uracil 149819-44-3 2,4(1H,3H)-Pyrimidinedione, 1-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl]-, (2S-cis)- AIDS-005666 AIDS005666 OxathiolanU-(+).b.