1. Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, Haus F, 81377 München, Germany
2. Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
3. Global Discovery Chemistry, Novartis Institutes for BioMedical Research, 141 Klybeckstrasse, 4057 Basel, Switzerland