1. Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent (Belgium), Fax: (+32) 9‐264‐62‐21
2. Center for Molecular Modeling, Ghent University, Technologiepark 903, 9052 Zwijnaarde (Belgium), Member of QCMM‐Alliance, Ghent‐Brussels (Belgium), Fax: (+32) 9‐264‐66‐97
3. Current address: Syngenta Crop Protection, Münchwilen AG, 4332 Stein (Switzerland)
4. Department of Chemistry, University of Bergen, Allégt. 41, 5007 Bergen (Norway)