(+)-(2R,5R)-5-Methyl-1-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl]cytosine 145986-25-0 2(1H)-Pyrimidinone, 4-amino-1-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl]-5-methyl-, (2R-trans)- AIDS-004781 AIDS004781 Oxathiolan 5MeC-.a.