1. Chemistry of Natural Compounds Department, National Research Centre, Dokki, Egypt;
2. Pharmaceutical Chemistry Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt;
3. Chemistry Department, Faculty of Science, Ain-shams University, Cairo, Egypt;
4. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh, Egypt;
5. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Egyptian Russian University, Badr City, Cairo, Egypt;
6. Department of Biochemistry, Faculty of Medicine, Cairo University, Cairo, Egypt