1. Janssen Research & Development, The Janssen Pharmaceutical Companies of Johnson & Johnson, Spring House, Pennsylvania 19477, United States
2. Department of Chemistry & Environmental Science, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
3. Department of Chemistry and Biochemistry, Montclair State University, 1 Normal Ave., Montclair, New Jersey 07043, United States
4. Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States