1. Department of Chemistry, Michigan State University, 578 S. Shaw Ln., East Lansing, Michigan 48824, USA
2. Department of Pharmacology and Toxicology, Michigan State University, 1355 Bogue St., East Lansing, Michigan 48824, USA
3. Department of Physiology, Michigan State University, 567 Wilson Rd., East Lansing, Michigan 48824, USA