1. USDA, Agricultural Research Service, National Center for Agricultural Utilization Research, 1815 N. University St., Peoria, Illinois 61604, United States
2. Department of Chemistry and Molecular Biology, University of Gothenburg, Gothenburg, Sweden
3. Structure, Biophysics & FBLG, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
4. Cayman Chemical, 1180 E. Ellsworth Rd., Ann Arbor, Michigan 48108, United States