1. Therapeutical Chemistry DepartmentNational Research Centre, Dokki P. O 12622, Giza Egypt
2. Chemistry Department, Faculty of ScienceAin Shams University, Abbassia P. O 11566, Cairo Egypt
3. Drug Bioassay‐Cell Culture Laboratory, Department of PharmacognosyNational Research Centre, Dokki P. O 12622, Giza Egypt