1. Department
of Molecular Medicine, The Scripps Research Institute, 10550 North
Torrey Pines Road, La Jolla, California 92037, United States
2. Department
of Pharmaceutical Chemistry, University of California, San Francisco, 600 16th Street, San Francisco, California 94158, United States
3. Skaggs
School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States