(-)-(2R,5S)-5-Chloro-1-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl]cytosine 145986-27-2 2(1H)-Pyrimidinone, 4-amino-5-chloro-1-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl]-, (2R-cis)- AIDS-004784 AIDS004784 Oxathiolan 5ClU-.b.