1. Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
2. Department
of Medical Oncology, Dana-Farber Cancer Institute, 360 Longwood
Avenue, Boston, Massachusetts 02115, United States
3. Chemical
Development,
Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States