1. Department of Biochemistry; Institute of Chemistry, P.J. Šafárik University Košice; Moyzesova 11 Košice Slovak Republic
2. Department of Organic Chemistry; Institute of Chemistry, P.J. Šafárik University Košice; Moyzesova 11 Košice Slovak Republic
3. Biomedical Research Center; University Hospital Hradec Kralove; Sokolovska 581, Hradec Kralove Czech Republic