1. Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States
2. Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
3. Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
4. Institute of Medical Microbiology, University of Zürich, Gloriastrasse 28, 8006 Zürich, Switzerland
5. Organic Chemistry Laboratory, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093 Zürich, Switzerland
6. Department of Chemistry, University of Georgia, 140 Cedar Street, Athens, Georgia 30602, United States