1. Department of Chemistry, New York University, New York, New York 10003, United States
2. Institute of Pharmaceutical Chemistry, Goethe-University Frankfurt, Max-von-Laue-Strasse 9, 60438 Frankfurt, Germany
3. Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Branch for Translational Medicine and Pharmacology TMP, Theodor-Stern-Kai 7, 60596 Frankfurt, Germany
4. Department of Chemistry and Center for Integrated Protein Science (CIPSM), Ludwig-Maximilians-University Munich, Butenandtstrasse 5-13, 81377 Munich, Germany