1. Department of Chemistry, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
2. Discovery Chemistry Platforms–Radiochemistry, Bristol-Myers Squibb, Post Office Box 4000, Princeton, NJ, USA.
3. Chemical Development, Bristol-Myers Squibb, One Squibb Drive, New Brunswick, NJ 08903, USA.