1. Department of Pharmaceutical Sciences, University of Pittsburgh, Biomedical Science Tower 3, Suite 10019, 3501 Fifth Avenue, Pittsburgh, Pennsylvania 15261, United States
2. Chair of Drug Design, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
3. Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, and School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, P. R. China