1. Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060 Wien, Austria
2. Discovery Science, Discovery Chemistry BE, Janssen Pharmaceutica N.V., Turnhoutseweg 30, 2340 Beerse, Belgium
3. Boehringer Ingelheim RCV GmbH & Co. KG, A-1121 Vienna, Austria