Affiliation: | 1. Department of Chemistry, Faculty of Pharmacy, Medical University of Sofia, 2, Dunav St., 1000 Sofia, Bulgaria;2. Institute of Microbiology, Bulgarian Academy of Sciences, 26, Acad. G. Bonchev St., 1113 Sofia, Bulgaria;3. Laboratory of Nuclear Magnetic Resonance, Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 9, Acad. G. Bonchev St., 1113 Sofia, Bulgaria;4. Laboratory of Experimental Chemotherapy, Department of Pharmacology, Pharmacotherapy and Toxicology, Faculty of Pharmacy, Medical University-Sofia, 2, Dunav St., 1000 Sofia, Bulgaria;5. Department of Physiology and Pharmacology “Vittorio Erspamer”, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy;6. Department for Toxicology, Faculty of Pharmacy, University of Belgrade, 450, Vojvode Stepe, St., 11221 Belgrade, Serbia;7. Bulgarian Academy of Sciences, Institute of Mineralogy and Crystallography, 107, Acad. G. Bonchev St., 1113 Sofia, Bulgaria |