1. Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106-9510, United States
2. Free Radical Research Facility, Department of Diabetes and Cardiovascular Science, University of the Highlands & Islands, Inverness, IV2 3JH, Scotland, U.K.
3. Department of Chemistry & Environmental Sciences, Lake Superior State University, Sault Ste. Marie, Michigan 49783, United States