1. Department of Medicinal Chemistry and Molecular Pharmacology, School of Pharmacy and Pharmaceutical Sciences, and Purdue University Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907
2. Department of Chemistry and Chemical Biology, Center for Advanced Biotechnology and Medicine, Rutgers University, 679 Hoes Lane West, Piscataway, New Jersey 08854
3. ImQuest Biosciences, Inc., 7340 Executive Way, Suite R, Frederick, Maryland 21704
4. Rega Institute for Medical Research, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium