1. Pharmacy Department, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
2. Department of Pharmaceutical Medicinal and Organic Chemistry, Faculty of Pharmacy, Sana’a University, 31220 Sana’a, Yemen
3. Center for Natural Products Research and Drug Discovery (CENAR), University of Malaya, 50603 Kuala Lumpur, Malaysia
4. Department of Pharmacognosy, Faculty of Pharmacy, Sana’a University, 31220 Sana’a, Yemen
5. Institute of Energy Infrastructure, Universiti Tenaga Nasional, 43000 Selangor, Malaysia
6. Drug Design and Development Research Group (DDDRG), University of Malaya, 50603 Kuala Lumpur, Malaysia
7. Chemistry Department, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
8. Chemistry Department, Faculty of Education, Dhamar University, 87246 Dhamar, Yemen