1. Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Perak, Malaysia
2. Atta-ur-Rahman Institute for Natural Product Discovery (AuRIns), Universiti Teknologi MARA, Bandar Puncak Alam, Selangor, Malaysia
3. Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia
4. Department of Pure and Industrial Chemistry, Faculty of Natural and Applied Sciences, Umaru Musa Yar’adua University, Katsina, Nigeria
5. Department of Fundamental Dental and Medical Sciences, Kulliyyah of Dentistry, International Islamic University Malaysia, Pahang, Malaysia