1. Department of Process Research and Development, Merck & Company, Inc., 33 Avenue Louis Pasteur, Boston, Massachusetts 02115, United States
2. Department Modeling and Informatics, Merck & Company, Inc., 90 E. Scott Avenue, Rahway, New Jersey 07065, United States
3. Department of Process Research and Development, Merck &Company, Inc., 126 E. Lincoln Avenue, Rahway, New Jersey 07065, United States
4. Department of Synthetic Chemistry, Pharmaron Beijing Company, Ltd., 6 Taihe Rd BDA, Beijing 100176, China