1. Analytical Research and Development, Merck & Co., Inc., Rahway, NJ 07065, USA
2. Department of Chemistry and Biochemistry, Seton Hall University, South Orange, NJ 07079, USA
3. Department of Chemistry and Biochemistry, University of North Carolina Wilmington, Wilmington, NC 28409, USA
4. Department of Computational and Structural Chemistry, Merck & Co., Inc., Rahway, NJ 07065, USA