1. Department of Pharmacy, Center for Drug Research, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377 Munich, Germany
2. Institute of Pharmaceutical Sciences, Albert-Ludwigs-Universität Freiburg, Albertstrasse 25, 79104 Freiburg, Germany
3. Department of Pharmaceutical Chemistry, Martin-Luther Universität Halle-Wittenberg, Wolfgang-Langenbeckstrasse 4, 06120 Halle/Saale, Germany