[1] Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA
[2] Purdue Univ, Dept Med Chem, W Lafayette, IN 47907 USA
[3] Georgia State Univ, Dept Biol, Atlanta, GA 30303 USA
[4] Kumamoto Univ, Dept Hematol, Grad Sch Med & Pharmaceut Sci, Kumamoto 8608556, Japan
[5] Kumamoto Univ, Dept Infect Dis, Grad Sch Med & Pharmaceut Sci, Kumamoto 8608556, Japan
[6] NCI, Expt Retrovirol Sect, HIV & AIDS Malignancy Branch, NIH, Bethesda, MD 20892 USA