1. Department of Biology, Centre for Forest Biology, University of Victoria , Victoria, BC V8P 5C2, Canada
2. Department of Biochemistry, Max Planck Institute for Chemical Ecology , Jena 07745, Germany
3. Agriculture and Agri-Food Canada , Ottawa, Ontario K1A 0C6, Canada
4. Department of Nuclear Magnetic Resonance, Max Planck Institute for Chemical Ecology , Jena 07745, Germany
5. Department of Natural Product Biosynthesis, Max Planck Institute for Chemical Ecology , Jena 07745, Germany