1. Walter Mors Institute of Research on Natural Products, Federal University of Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
2. Biological Science Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
3. Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
4. Departments of Genetics and Biochemistry and Molecular Biology, Complex Carbohydrate Research Center and Institute of Bioinformatics, University of Georgia, Athens, Georgia 30602, United States
5. West Coast Metabolomics Center for Compound Identification, UC Davis Genome Center, University of California, Davis, California 95616, United States
6. Department of Chemistry, University of California, Davis, California 95616, United States