1. Department of Chemistry and Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
2. Bristol Myers Squibb Research & Development, 700 Bay Road, Redwood City, California 94063, United States
3. Bristol Myers Squibb Research & Development, P.O. Box 4000, Princeton, New Jersey 08543 United States