1. Department of Chemistry, Faculty of Applied Sciences, Universiti Teknologi MARA, Jengka, Pahang, Malaysia
2. Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Malaysia
3. Centre for Drug Research, Universiti Sains Malaysia, Pulau Pinang, Malaysia
4. School of Chemical Sciences, Universiti Sains Malaysia, Pulau Pinang, Malaysia
5. Faculty of Science and Marine Environment, University Malaysia Terengganu, Kuala Nerus, Malaysia
6. Centre of Applied Science Studies, Universiti Teknologi Mara, Kuching, Sarawak, Malaysia