(-)-(2S,5S)-5-Fluoro-1-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl]uracil 149819-47-6 2,4(1H,3H)-Pyrimidinedione, 5-fluoro-1-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl]-, (2S-trans)- AIDS-005671 AIDS005671 Oxathiolan, 5FU-(-).a.