1. Department of Chemistry, Scripps Research, La Jolla, California 92037, United States
2. Department of Chemistry and Biochemistry, University of California at Los Angeles, Los Angeles, California 90095, United States
3. Departments of Molecular Medicine and Neuroscience, Scripps Research, La Jolla, California 92037, United States
4. DISCoBio, Scripps Research, La Jolla, California 92037, United States