1. Department of Computational and Structural Chemistry, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States
2. Department of Process Research & Development, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States
3. Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
4. Department of Computational and Structural Chemistry, MRL, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States