1. Program for Collaborative Research in the Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612
2. Department of Biochemistry, College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612
3. Shaman Pharmaceuticals, Inc., 213 East Grand Avenue, South San Francisco, California 94080
4. Laboratorio de Technologia Farmaceutica, Universidade Federal da Paraiba, Joao Pessoa, Brazil