1. Central Institute of Laboratory Medicine and Pathobiochemistry, Charité Berlin, Hindenburgdamm 30, 12200 Berlin, Germany, Glycodesign and Glycoanalytics, Central Institute of Laboratory Medicine and Pathobiochemistry, Charité Berlin, Charité Platz 1, 10117 Berlin, Germany, and Freie Universität Berlin, Fachbereich Biologie, Chemie, Pharmazie, Takustr. 3, 14195 Berlin, Germany