1. Department of Discovery Chemistry, Merck & Co., Inc., Boston, Massachusetts 02115, United States
2. Department of Process Research and Development, Merck & Co., Inc., Boston, Massachusetts 02115, United States
3. Computational and Structural Chemistry, Merck & Co., Inc., P.O. Box 2000, Rahway, New Jersey 07065, United States
4. Analytical Research and Development, Merck & Co., Inc., Boston, Massachusetts 02115, United States