1. Department of Pharmacology, Faculty of Medicine, Universiti Malaya, Wilayah Persekutuan Kuala Lumpur, Malaysia.
2. Centre for Natural Products Research and Drug Discovery, Universiti Malaya, Wilayah Persekutuan Kuala Lumpur, Malaysia.
3. Department of Chemistry, Faculty of Science, Universiti Malaya, Kuala Lumpur, Wilayah Persekutuan Kuala Lumpur, Malaysia.
4. Drug Design and Development Research Group, Universiti Malaya, Wilayah Persekutuan Kuala Lumpur, Malaysia.