troxacitabine [ 1-(2-(hydroxymethyl)-1,3-dioxolan-4-yl)cytosine,2R(-)-cis-HMD-cytosine,2R(-)-trans-HMD-cytosine,BCH 4556,BCH-4556,HMD-cytosine,Troxatyl,beta-L-dioxolane-cytidine,troxacitabine, 2R(-)-cis-isomer,troxacitabine, 2R(-)-trans-isomer,troxacitabine, 2S(-)-trans-isomer,troxacitabine, cis-(+-)-isomer,troxacitabine, trans-(+-)-isomer ] structure given in first source; shows good anti-HIV activity without cytotoxicity; RN refers to the (2R(-)-trans)-isomer