1. Center for Integrated Technology and Organic Synthesis, MolSys Research Unit, University of Liège, B-4000 Liège (Sart Tilman), Belgium
2. Mass Spectrometry Laboratory, MolSys Research Unit, University of Liège, B-4000 Liège (Sart Tilman), Belgium
3. XStruct, Department of Chemistry, Ghent University, Krijgslaan 281-S3, B-9000 Ghent, Belgium