[1] Univ N Carolina, Nat Prod Res Labs, Eshelman Sch Pharm, Chapel Hill, NC 27599 USA
[2] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA
[3] Univ Calif Irvine, Coll Med, Irvine, CA 92697 USA
[4] Univ N Carolina, Sch Med, Chapel Hill, NC 27599 USA
[5] Univ N Carolina, Div Med Chem & Nat Prod, Eshelman Sch Pharm, Chapel Hill, NC 27599 USA
[6] NCI, Frederick Canc Res & Dev Ctr, Frederick, MD 21702 USA
[7] Osaka Univ Pharmaceut Sci, Takatsu Ki, Osaka 5691094, Japan
[8] Tokyo Univ Pharm & Life Sci, Tokyo 1920355, Japan
[9] China Med Univ & Hosp, Chinese Med Res & Dev Ctr, Taichung, Taiwan