1. Institute of Pharmacy, Friedrich-Schiller-University Jena, Semmelweisstrasse 10, D-07743, Jena, Germany, Research Group Biosynthesis/NMR, Max Planck Institute for Chemical Ecology, Beutenberg Campus, Hans-Knöll-Strasse 8, D-07745 Jena, Germany, and Research Center on Entomogenous Fungi, Anhui Agricultural University, Hefei, Anhui, 230036, People's Republic of China