1. Department of Physics, Chemistry, and Pharmacy University of Southern Denmark Campusvej 55 5230 Odense M Denmark
2. Área de Química Orgánica, Instituto de Bioingeniería Universidad Miguel Hernández Elche 03202 Alicante Spain), Fax
3. Department of Chemistry The University of Texas at Austin 105 E. 24th Street, Stop A5300 Austin Texas 78712-1224 USA), Fax