1. Institute of Chemistry, University of Campinas—UNICAMP, P.O. Box
6154, CEP 13083-970, Campinas, São Paulo, Brazil
2. Goodwin Laboratory, Massey Cancer Center, Virginia Commonwealth University, 401 College Street, Richmond, Virginia 23298, United States
3. Department of Chemistry, Virginia Commonwealth University, 1001 W. Main Street, Richmond, Virginia 23284-2006, United States