4-(1-Hydroxy-ethyl)-5-hydroxymethyl-1-((3aR,4R,6R,6aR)-6-hydroxymethyl-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl)-1H-pyrimidin-2-one AIDS-059326 AIDS059326 Ribosyl der.