1. Departments of Chemical Development and Material and Analytical Sciences, Boehringer Ingelheim Pharmaceuticals, Inc., Ridgefield, Connecticut 06877, United States
2. Chemical Process Development, Boehringer Ingelheim GmbH & Co KG, 55216 Ingelheim am Rhein, Germany
3. Vitae Pharmaceuticals, Inc., Fort Washington, Pennsylvania 19034, United States
4. Medicinal Chemistry, Boehringer Ingelheim Pharma GmbH & Co KG, 88397 Biberach an der Riss, Germany