1. Department of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0358, United States
2. Department of Pharmacology and
Toxicology, College of Pharmacy, University of Arizona, 1703 East Mabel Street, Tucson, Arizona 85721, United States
3. Department of Chemistry, Department
of Molecular Biosciences, and the Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois 60208,
United States