1. Department of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United States
2. Department of Pharmacology, University of Nevada, Reno School of Medicine, Reno, Nevada 89557-0318, United States
3. Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, Nevada 89557-0352, United States
4. Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand