1. Department of Photonics and Sensors, Innovative Bio-, Medical- and Environmental Technologies (GMBU e.V.), Felsbachstrasse 7 D-07745 Jena, Germany, and Leibniz Institute for Natural Product Research and Infection Biology e.V., Hans-Knöll-Institute (HKI), Beutenbergstrasse 11a, D-07745 Jena, Germany