(-)-(2S,5S)-5-Methyl-1-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl]cystosine 149819-51-2 2(1H)-Pyrimidinone, 4-amino-1-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl]-5-methyl-, (2S-trans)- AIDS-005679 AIDS005679 Oxathiolan, 5MeC-(-).a.