1. Department of Pharmaceutical Chemistry, College of Pharmacy, University of Hail, Hail, Saudi Arabia;
2. Centre for Natural and Medicinal Product Research, School of Pharmacy, University of Nottingham Malaysia, Semenyih, Malaysia;
3. School of Biosciences, University of Nottingham Malaysia, Semenyih, Malaysia;
4. Unit of Molecular Pathology, Cancer Research Centre, Institute for Medical Research, Kuala Lumpur, Malaysia