1. Institute for Molecular Microbiology and Biotechnology, University of Münster, Corrensstr. 3, Münster 48149, Germany
2. VIB Centre for Structural Biology, Vlaams Instituut voor Biotechnologie (VIB), Pleinlaan 2, Brussels 1050, Belgium
3. Jean Jeener NMR Centre, Vrije Universiteit Brussel (VUB), Pleinlaan 2, Brussels 1050 Belgium
4. Institute for Food Chemistry, University of Münster, Corrensstr. 45, Münster 48149, Germany
5. Organic Chemistry Research Group, Department of Chemistry and Department of Bioengineering Sciences, Vrije Universiteit Brussel (VUB), Pleinlaan 2, Brussels 1050, Belgium