1. Faculty of Chemistry, Organic and Bioorganic Chemistry, Bielefeld University, Bielefeld, Germany
2. Faculty of Science, Department of Chemistry, Al-Azhar University, Cairo, Egypt
3. Department of Microbial Chemistry, Genetic Engineering and Biotechnology Research Division, National Research Centre, Giza, Egypt
4. Faculty of Pharmacy, Department of Pharmacognosy, Helwan University, Helwan, Egypt
5. Faculty of Science, Department of Botany and Microbiology, Al-Azhar University, Cairo, Egypt
6. Department of Chemistry, Inorganic and Structural Chemistry, Bielefeld University, Bielefeld, Germany
7. Chemistry of Natural Compounds Department, Pharmaceutical and Drug Industries Research Division, National Research Centre, Giza, Egypt