1. Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Tanjong Malim, Perak, Malaysia
2. Department of Pure and Industrial Chemistry, Faculty of Natural and Applied Science, Umaru Musa Yar’adua University, Katsina, Nigeria
3. Department of Pharmaceutical Chemistry and Phytochemistry, Nirmala College of Pharmacy, Atmakur, Mangalagiri Mandal, Andhra Pradesh, India
4. Atta-ur-Rahman Institute for Natural Product Discovery (AuRIns), Universiti Teknologi MARA, Puncak Alam Campus, Bandar Puncak Alam, Selangor, Malaysia
5. Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia