1. Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
2. Departamento de Bioquímica, Instituto de Química de São Paulo, Universidade de São Paulo, Caixa Postal 26077, CEP05513-970 São Paulo, SP, Brasil
3. Department of Chemistry and Environmental Sciences, Lake Superior State University, Sault Sainte Marie, Michigan 49783 United States