1. Institute of Biodiversity and Ecosystem Research; Sofia Bulgaria
2. Department of Organic Chemistry; University of Food Technologies; Plovdiv Bulgaria
3. Laboratory of Applied Biotechnology; The Stefan Angeloff Institute of Microbiology; Bulgarian Academy of Sciences; Plovdiv Bulgaria
4. Center for Viticulture and Small Fruit Research; Florida A&M University; Tallahassee FL USA
5. Departament de Productes Naturals; Biologia Vegetal i Edafologia; Facultat de Farmacia; Universitat de Barcelona; Barcelona Spain
6. Department of Analytical Chemistry; University of Food Technologies; Plovdiv Bulgaria