1. Department of Chemistry, The Scripps Research Institute, La Jolla, California 92037, United States
2. Lundbeck, La Jolla, California 92121, United States
3. Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California 92037, United States
4. Pathology and Laboratory Medicine, University of California, Los Angeles, Los Angeles, California 90024, United States