1. Department of Pharmacognosy, Faculty of Pharmacy, Helwan University, P.O.B. 11795, Ain-Helwan, Cairo, Egypt
2. Department of Pharmacognosy, College of Pharmacy, King Khaled University, P.O.B. 1882 Abha, Kingdom of Saudi Arabia
3. Department of Chemisty of Natural Compounds, National Research Center, Dokki, Cairo, Egypt
4. Institute of Organic Chemistry, Leibniz University Hannover, Schneiderberg 1B, D-30167 Hannover, Germany
5. Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szt. Gellért tér 4, H-1111 Budapest, Hungary