1. School of Pharmaceutical Science
and Technology, Tianjin University, Tianjin,
300072, P. R. China
2. School
of Chemistry, University of Melbourne,
Victoria 3010, Australia and
Australian Research Council Centre of Excellence for Free Radical
Chemistry and Biotechnology
3. Division of Pharmaceutical Sciences
and Department of Chemistry, University of Wisconsin at Madison, Madison, Wisconsin 53705, United States
4. Department of Chemistry and
Biochemistry, University of California,
Los Angeles, California 90095, United States