1. Institute of Organic Chemistry with Centre of PhytochemistryBulgarian Academy of Sciences Acad. G. Bonchev Str. Bl.9 1113 Sofia Bulgaria
2. Institute of Biophysics and Biomedical EngineeringBulgarian Academy of Sciences Acad. G. Bonchev Str. Bl. 21 1113 Sofia Bulgaria
3. Institute of Organic Chemical TechnologyFaculty of Chemical Technology and EngineeringWest Pomeranian University of Technology Szczecin Pulaski Str. 10 70-322 Szczecin Poland