1. SW
Center for Natural Products Research and Commercialization, School
of Natural Resources and the Environment, College of Agriculture and
Life Sciences, University of Arizona, 250 East Valencia Road, Tucson, Arizona 85706, United States
2. Whitehead Institute for Biomedical Research, 9 Cambridge Center, Cambridge, Massachusetts 02142, United States
3. Laboratório
de Oncologia Experimental, Departamento de Fisiologia e Farmacologia, Universidade Federal do Ceará, P.O. Box 3157, Fortaleza, Ceará 60430-270, Brazil
4. Department
of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02142, United States
5. Howard Hughes Medical Institute, Cambridge, Massachusetts 02142, United States