1. Department of Pharmacognosy; College of Pharmacy; King Saud University; Riyadh 11451 Saudi Arabia
2. Department of Natural Products and Alternative Medicine; Faculty of Pharmacy; King Abdulaziz University; Jeddah 21589 Saudi Arabia
3. Department of Pharmacognosy; Faculty of Pharmacy; Al-Azhar University, Assiut Branch; Assiut 71524 Egypt
4. Department of Pharmacognosy and Pharmaceutical Chemistry; College of Pharmacy; Taibah University; Al-Madinah Al-Munawarah 30078 Saudi Arabia