1. Institute of Pharmaceutical Chemistry Goethe University Frankfurt Max-von-Laue-Str. 9 60438 Frankfurt Germany
2. Department of Pharmacy Ludwig-Maximilians-Universität München Butenandtstr. 5–13 81377 Munich Germany
3. Fraunhofer Institute for Translational Medicine and Pharmacology ITMP Theodor-Stern-Kai 7 60596 Frankfurt Germany