1. Lund University, Department of Chemistry, Centre for Analysis and Synthesis, P.O.
Box 124, SE-22100 Lund, Sweden
2. Stockholm University, Department of Organic Chemistry, Svante Arrhenius väg 16C, SE-106 91 Stockholm, Sweden
3. Lund University, Department of Chemistry, Physical Chemistry, P.O. Box 124, SE-22100 Lund, Sweden