1. Department of Pharmacy Ludwig-Maximilians-University of Munich Butenandtstr. 5–13 81377 München Germany
2. Department of Chemical Technology of Drugs Poznan University of Medical Sciences 6 Grunwaldzka St. 60-780 Poznan Poland
3. CBMN (UMR 5248) Univ. Bordeaux, CNRS Bordeaux INP 2, Rue Robert Escarpit 33600 Pessac France