1. Dr. Knoell Consult GmbH, Dynamostrasse 19, 68165 Mannheim, Germany
2. Institute of Organic Chemistry, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
3. tesa SE, Research & Development, Quickbornstrasse 24, 20253 Hamburg, Germany