1. Department of Chemical Biology and Drug DiscoveryUtrecht Institute for Pharmaceutical SciencesBijvoet Center for Biomolecular ResearchUtrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
2. Complex Carbohydrate Research CenterUniversity of Georgia 315 Riverbend Road Athens GA 30602 USA
3. Department of ChemistryUniversity of Georgia Athens GA USA