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 Sciences , Umaru Musa Yar’adua University , Katsina , Nigeria
3. Atta-ur-Rahman Institute for Natural Product Discovery (AuRIns), Universiti Teknologi MARA , Puncak Alam Campus , Bandar Puncak Alam , Selangor , Malaysia
4. Faculty of Applied Sciences , Universiti Teknologi MARA , Shah Alam , Selangor , Malaysia