1. Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
2. Department of Chemistry, McGill University, Montreal, Quebec H3A 0B8, Canada
3. School of Pharmacy, University of East Anglia, Norwich NR4 7TJ, U.K.
4. Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32308, United States