1. Department of Chemistry, Faculty of Pharmacy, 2 Dunav Street, 1000 Sofia, Bulgaria
2. Department of Chemistry, Faculty of Science, University of Aarhus, Langelandsgade 140, 8000 Aarhus C, Denmark
3. Laboratory of Virology, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Zankov, 1164 Sofia, Bulgaria
4. Laboratory of Biocoordination and Bioanalytical Chemistry, Faculty of Chemistry, Sofia University “St. Kliment Ohridski”, 1 J. Bourchier, 1164 Sofia, Bulgaria
5. Laboratory of Cell Cultures, National Center of Infectious and Parasitic Diseases, 44 A Stoletov Street, 1233 Sofia, Bulgaria
6. Laboratory of Retroviruses, National Center of Infectious and Parasitic Diseases, 44 A Stoletov Street, 1233 Sofia, Bulgaria
7. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, 2 Dunav Street, 1000 Sofia, Bulgaria