1. Latvian Institute of Organic Synthesis, Aizkraukles 21, Riga LV-1006, Latvia
2. Institut Malgache de Recherches Appliquées, Fondation Rakoto-Ratsimamanga, Avarabohitra Itaosy, lot AVB 77, 102-Antananarivo, Madagascar
3. Department
of Pharmaceutical Biosciences, Uppsala University, Husargatan 3, SE751 24 Uppsala, Sweden