1. Department of Natural Product Biosynthesis, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, Jena 07745, Germany
2. Centre for Novel Agricultural Products, Department of Biology, University of York, York, YO10 5DD, U.K.
3. Research Group Biosynthesis and NMR, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, Jena 07745, Germany