1. Center for Marine Biotechnology and BiomedicineScripps Institution of OceanographyUniversity of California, San Diego La Jolla CA 92093 USA
2. Department of Organic ChemistryUniversity of Campinas UNICAMPCidade Universitária Zeferino Vaz s/n P.O. Box 6154 13083-970 Campinas SP Brazil
3. Skaggs School of Pharmacy and Pharmaceutical SciencesUniversity of California San Diego La Jolla CA 92093 USA