1. Laboratory of Natural Products, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Malaysia
2. Department of Chemistry, Faculty of Science, University of Benghazi, Benghazi, Libya
3. Atta-ur-Rahman Institute for Natural Product Discovery, Universiti Teknologi MARA, Bandar Puncak Alam, Malaysia
4. Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Malaysia
5. School of Fundamental Science, Universiti Malaysia Terengganu, Kuala Nerus, Malaysia
6. Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, Malaysia
7. Department of Food Science, Faculty of Food Science and Technology, Universiti Putra Malaysia, Serdang, Malaysia