(+).a.-Dioxolan-5F-C .alpha.-L-(+)-(2S,4R)-1-[2-(Hydroxymethyl)-1,3-dioxolan-4-yl]-5-fluorocytosine .alpha.-L-5F-3TC .alpha.-L-Dioxolanyl-5-fluorocytidine 147060-42-2 AIDS-005784 AIDS005784