1. Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Leiden University, Einsteinweg 55, 2333 CCLeiden, The Netherlands
2. DSM Biotechnology Center, Alexander Fleminglaan 1, 2613 AXDelft, The Netherlands
3. Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CCLeiden, The Netherlands