1. Chemistry of Tanning Materials and Leather Technology Department, National Research Centre, 33 El Bohouthst
(Former EL Tahrirst.), Dokki, Giza, Egypt
2. Pharmacognosy Department, Faculty of Pharmacy, Al-Azhar
University, 11884, Nasr City, Cairo, Egypt
3. Chemistry of Medicinal Plants Department, Pharmaceutical and Drug
Industries Research Division, National Research Centre, Giza, Egypt