1. Center for Catalysis and Florida Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, 214 Leigh Hall,
P.O. Box 117200, Gainesville, Florida 32611, United States
2. Department of Chemistry, University of Nevada, Reno, Nevada 89557, United States
3. Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, San Diego, California 92093, United States
4. Department of Chemistry, University of Florida, 214 Leigh Hall,
P.O. Box 117200, Gainesville, Florida 32611, United States