1. Pharmacognosy Department, Faculty of Pharmacy; Helwan University; Helwan 11795 Cairo Egypt
2. Microbial Chemistry Department Genetic Engineering and Biotechnology Research Division; National Research Centre; El-Buhouth St. 33; Dokki-Cairo 12622 Egypt
3. Chemistry Department, Faculty of Science; Al-Azhar University; Nasr City-Cairo 11884 Egypt
4. Biology Unit, Central Laboratory for Pharmaceutical and Drug Industries Research Division, Chemistry of Medicinal Plants Department; National Research Centre; El-Buhouth St. 33; Dokki-Cairo 12622 Egypt
5. Chemistry of Natural Compounds Department, Pharmaceutical and Drug Industries Research Division; National Research Centre; El-Buhouth St. 33; Dokki-Cairo 12622 Egypt