1. School of
Chemistry, The University of Sydney, NSW
2006, Australia
2. Department
of Pharmacology and Toxicology, University of Otago, P.O. Box 913, Dunedin, New Zealand
3. X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
4. Departamento de Quimica, Universidade Federal da Paraiba, Joao Pessoa, PB, Brazil
5. Department of Radiation Oncology, Duke University, Durham, North Carolina 27710, United
States