1. Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas 66047, United States
2. Calibr, Scripps Research Institute, La Jolla, California 92037, United States
3. Nuclear Magnetic Resonance Laboratory, University of Kansas, Lawrence, Kansas 66047, United States
4. Protein Production Group, University of Kansas, Lawrence, Kansas 66047, United States
5. Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66047, United States