1. Pharmaceutical Institute, Pharmaceutical Chemistry II, University of Bonn, 53121 Bonn, Germany
2. Department of Medicinal and Pharmaceutical Chemistry, Sree Vidyanikethan College of Pharmacy, Tirupathi, Andhra Pradesh 517102, India
3. Merck Canada Inc., Kirkland, Quebec H9H 4M7, Canada
4. College of Pharmacy, Roosevelt University, Schaumburg, Illinois 60173, United States
5. Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan 250012, P.R. China
6. Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, DK-5230, Odense M, Denmark
7. Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha 68198-5880, United States