1. The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, 139 Ruski Blvd, 4000 Plovdiv, Bulgaria
2. Department of Chemical Technology, University of Plovdiv Paisii Hilendarski, 24 Tz. Assen, 4000 Plovdiv, Bulgaria
3. Department of Botany, University of Plovdiv Paisii Hilendarski, 24 Tz. Assen, 4000 Plovdiv, Bulgaria
4. Department of Pharmacognosy and Pharmaceutical Chemistry, Medical University of Plovdiv, 15A V. Aprilov, 4000, Plovdiv, Bulgaria