1. Institute of Organic Chemistry and Center for Molecular Biosciences Leopold-Franzens-University Innsbruck Innrain 80–82 6020 Innsbruck Austria
2. Department of Chemistry and Pharmacy Ludwig-Maximilians-University Munich Butenandtstrasse 5–13 81377 Munich Germany
3. Research & Development Weed Control Chemistry, Bayer AG Crop Science Division Industriepark Höchst 65926 Frankfurt am Main Germany
4. Institute of General Inorganic & Theoretical Chemistry Leopold-Franzens-University Innsbruck Innrain 80–82 6020 Innsbruck Austria