1. Maria Curie-Sklodowska University; Department of Organic Chemistry; Gliniana 33 20-614 Lublin Poland
2. Institute of Organic Chemistry, Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
3. University of Cologne; Albertus-Magnus-Platz 50923 Köln Germany
4. Institute of Organic Chemistry and Technology; Cracow University of Technology; Warszawska 24 31-155 Cracow Poland