1. Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, and Bijvoet Center for Biomolecular Research, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
2. Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
3. Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia 30602, United States
4. Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States