1. Center for Integrative Chemical Biology and Drug Discovery; Division of Chemical Biology and Medicinal Chemistry; Eshelman School of Pharmacy, University of North Carolina at Chapel Hill; Chapel Hill NC 27599 USA
2. Present address: Chimerix. Inc.; 2505 Meridian Parkway, Suite 100 Durham NC 27713 USA
3. Present address: BioCryst Pharmaceuticals, Inc.; 2100 Riverchase Center, Building 200, Suite 200 Birmingham AL 35244 USA
4. Present address: Department of Chemistry; Montgomery College; 51 Mannakee Street Rockville MD 20850 USA
5. Present address: School of Pharmacy; Zhejiang University of Technology; Jiangshan Zhejiang China
6. Meryx, Inc.; 450 West Drive, CB# 7295 Chapel Hill NC 27599-7295 USA
7. Department of Pharmacology; University of North Carolina at Chapel Hill; Chapel Hill NC 27599-7365 USA
8. Aflac Cancer and Blood Disorders Center of Children's Healthcare of Atlanta; Department of Pediatrics; School of Medicine; Emory University; Atlanta GA 30322 USA
9. Lineberger Comprehensive Cancer Center; Department of Medicine; School of Medicine; University of North Carolina at Chapel Hill; Chapel Hill NC 27599 USA