1. Department of Process Research and Development, Merck & Co., Inc., Boston, Massachusetts 02115, United States
2. Department of Discovery Chemistry, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
3. Department of Discovery Chemistry, Merck & Co., Inc., Boston, Massachusetts 02115, United States
4. WuXi AppTec (Tianjin), Chemistry Service Unit, Tianjin 300457, China
5. Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States