(+/-) (Cis)-1-[2-(Hydroxymethyl)-1,3-oxathiolan-5-yl]cytosine (+/-)-BCH-189 (+/-)-SddC;(+/-)-3TC 2(1H)-Pyrimidinone, 4-amino-1-[2-(hydroxymethyl)-1,3-oxathiolan-5-yl], (+/-) (Cis) AIDS-005663 AIDS005663 BCH-189 NSC620753