[1] Kekulé Institute of Organic Chemistry and Biochemistry, Pharmaceutical Institute, University of Bonn, 53121 Bonn, Germany
[2] Department of Bioorganic Chemistry, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany
[3] Department of Infection Biology Germany, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knoll Institute, 07745 Jena, Germany
[4] Pharmaceutical Institute, University of Bonn, 53121 Bonn, Germany
[5] Institute of Organic Chemistry, University of Würzburg, 97074 Würzburg, Germany
[6] College of Life Sciences, Central China Normal University, Wuhan 430079, China