1. Key Laboratory
of Combinatorial
Biosynthesis and Drug Discovery (Wuhan University), Ministry of Education,
State Key Laboratory of Virology, Wuhan University School of Pharmaceutical
Sciences, Wuhan 430072, China
2. Department of Cancer Biology,
The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida
33458, United States
3. Department
of Chemistry, University
of Illinois, 600 South Mathews Avenue, Urbana, Illinois 61801, United
States