1. Division of Bioorganic Chemistry
2. School of Pharmacy
3. Saarland University
4. D-66123 Saarbruecken
5. Germany
6. Department of Technology and Biotechnology of Drugs
7. Faculty of Pharmacy
8. Jagiellonian University
9. Medical College
10. 30-688 Cracow
11. Department of Medical Microbiology and Immunobiology
12. Faculty of Medicine
13. University of Szeged
14. H-6720 Szeged
15. Hungary
16. Department of Chemistry
17. Institute of Biology
18. Pedagogical University
19. 30-084 Kraków
20. Poland
21. Faculty of Chemistry
22. 30-387 Kraków
23. Department of Pharmaceutical Microbiology