1. Free University of Brussels, VUB, Department of General and Organic Chemistry, Faculty of Engineering, Room 8G512, Brussels, Belgium
2. Room 8G512, High Resolution NMR Centre, HNMR, Pleinlaan 2, Brussels B-1050, Belgium
3. A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 117813, Russia
4. Pharmachemie BV, Medical Department, Haarlem NL-2003 RN, Netherlands Antilles
5. Catholic University of Louvain, INAN, Louvain-la-Neuve, Belgium