[1] Univ Cape Town, Dept Chem, ZA-7701 Rondebosch, South Africa
[2] Univ Cape Town, Div Pharmacol, ZA-7925 Observatory, South Africa
[3] Univ Illinois, Coll Pharm, Inst TB Res, Chicago, IL 60612 USA
[4] Univ Calif San Francisco, San Francisco Gen Hosp, Dept Med, San Francisco, CA 94143 USA
[5] Univ Cape Town, Inst Infect Dis & Mol Med, ZA-7701 Rondebosch, South Africa