1. Merck & Company, Inc., Process Research, 126 East Lincoln Avenue RY800-C262, Rahway, New Jersey 07065, United States
2. Department
of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
3. Merck Animal Health, 2 Giralda Farms, Madison, New Jersey 07940-1026, United States