1. Department Pharmaceutical Technology and Biopharmacy, Faculty of Pharmacy, Medical University—Sofia, 1000 Sofia, Bulgaria
2. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University—Sofia, 1000 Sofia, Bulgaria
3. Department of Pharmacology, Pharmacotherapy and Toxicology, Faculty of Pharmacy, Medical University—Sofia, 1000 Sofia, Bulgaria
4. Faculty of Pharmacy, Medical University—Pleven, 5800 Pleven, Bulgaria
5. Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria