1. Department of Natural Product Biosynthesis Max Planck Institute for Chemical Ecology Hans-Knöll Straße 8 Jena 07745 Germany
2. Chinese Academy of Sciences Centre for Excellence in Molecular Plant Sciences Shanghai Institute of Plant Physiology and Ecology 300 Feng Lin Road Shanghai 200032 China
3. Research Group Biosynthesis and NMR Max Planck Institute for Chemical Ecology Hans-Knöll Straße 8 Jena 07745 Germany
4. Department of Biochemistry and Metabolism John Innes Centre Norwich Research Park Norwich NR4 7UH UK
5. Department of Structural Cell Biology Max-Planck Institute for Biochemistry Am Klopferspitz 18, Martinsried 82152 Planegg Germany