1. Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc, 900 Ridgebury Road, Ridgefield, Connecticut 06877, United States
2. Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284-3028, United States
3. Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
4. Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
5. Department of Chemical and Life Science Engineering, Virginia Commonwealth University, 601 Main Street, P.O. Box 843028, Richmond, Virginia 23284-3028, United States
6. Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
7. Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
8. Material and Analytical Sciences, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, Connecticut 06877, United States
9. Astatech BioPharmaceutical Corporation, 488 Kelin West Road, Wengjiang, Chendu, Sichuan 611130, People’s Republic of China