1. Dept. of Solid-State NMR Leiden Institute of Chemistry Leiden University Einsteinweg 55 2333 CC Leiden The Netherlands
2. Dept. of Medicinal Biochemistry Leiden Institute of Chemistry Leiden University Einsteinweg 55 2333 CC Leiden The Netherlands
3. Dept. of Bio Organic Synthesis Leiden Institute of Chemistry Leiden University Einsteinweg 55 2333 CC Leiden The Netherlands