1. Department
of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
2. Pfizer Global Research and Development, 10770 Science Center Drive, San Diego, California 92121, United States
3. Bristol-Myers Squibb Company, 311 Pennington
Rocky Hill Road, Pennington, New Jersey 08534, United States