1. Faculty of Sciences and Arts, Chemistry Department, Najran University, Najran, Saudi Arabia
2. Faculty of Science, Chemistry Department, Aswan University, Aswan, Egypt
3. Faculty of Science, Chemistry Department, Aswan University, Aswan, Egypt , Fax: +297-348-0450
4. Phytochemistry Department, National Research Centre, El-Tahrir Street, Dokki, Giza, 12622, Egypt
5. Phytochemistry Department, Natural Research center, El-Tahrir Street, Dokki, Giza, 12622, Egypt