1. National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia
2. University of Nova Gorica, Vipavska 13, SI-5000 Nova Gorica, Slovenia
3. Elettra-Sincrotrone Trieste S.C.p.A., Strada Statale 14 - km 163,5 in AREA Science Park, 34149 Basovizza, Trieste, Italy
4. Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 9, 1113 Sofia, Bulgaria