1. Plant Metabolism and Metabolic Engineering Program; Centre for Research in Agricultural Genomics (CRAG); CSIC-IRTA-UAB-UB; Campus de la Universitat Autònoma de Barcelona 08193 Bellaterra (Barcelona) Spain
2. Department of Biochemistry; Max Planck Institute for Chemical Ecology; Hans Knöllstr. 8 07745 Jena Germany
3. Biosynthesis and Nuclear Magnetic Resonance Group; Max Planck Institute for Chemical Ecology; Hans Knöllstr. 8 07745 Jena Germany
4. Laboratory of Entomology; Wageningen University; Droevendaalsesteeg 1 6708 Wageningen The Netherlands