[1] Ono Pharmaceut Co Ltd, Med Chem Res Lab, Osaka 6188585, Japan
[2] Ono Pharmaceut Co Ltd, Exploratory Res Lab, Ibaraki 300424, Japan
[3] GlaxoSmithKline Res & Dev Ltd, Res Triangle Pk, NC 27709 USA
[4] Kumamoto Univ, Sch Med, Dept Internal Med 2, Kumamoto 8600811, Japan
[5] NCI, Expt Retrovirol Sect, HIV & AIDS Malignancy Branch, NIH, Bethesda, MD 20892 USA