(+)-(2S,5R)-5-Methyl-1-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl]cytosine 137623-41-7 2(1H)-Pyrimidinone, 4-amino-1-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl]-5-methyl-, (2S-cis)- AIDS-005678 AIDS005678 Oxathiolan, 5MeC-(+).b.