1. Max-Planck-Institute for Chemical Ecology NMR/Biosynthesis Group Hans-Knöll-Straße 8 07745 Jena Germany
2. Institute of Botany Jiangsu Province and Chinese Academy of Sciences No.1 Qianhu Houcun Xuanwu District 210014 Nanjing P. R. China
3. Leibniz Institute for Natural Product Research and Infection Biology Hans Knöll Institute (Leibniz-HKI) Beutenbergstraße 11a 07745 Jena Germany