1. Department of Chemistry, Boehringer Ingelheim (Canada) Ltd., 2100 Cunard Street, Laval, Quebec, H7S 2G5, Canada
2. Chemical Development, Non-Clinical Drug Safety, Boehringer Ingelheim Pharmaceutical Inc., 900 Ridgebury Road, Ridgefield, Connecticut 06877, United States
3. Office of New Drug Quality Assessment, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, 10903 New Hampshire Avenue, Building 22, Room 1446, Silver Spring, Maryland 20993, United States