1. Department of Chemistry and Biochemistry, Samford University, 800 Lakeshore Blvd., Birmingham, Alabama 35229, United States
2. Department of Chemistry, The University of Alabama at Birmingham, Birmingham, Alabama 35205, United States
3. Department of Biological and Environmental Sciences, Samford University, Birmingham, Alabama 35229, United States
4. Department of Chemistry & Biochemistry, Florida State University, Tallahassee, Florida 32306, United States