1. State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, China
2. Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming 650204, China
3. Max Planck Institute for Chemical Ecology, Department of Biochemistry, Hans-Knöll Str. 8, 07745 Jena, Germany