1. Chemistry Division, Centre for Foundation Studies in Science, Universiti Malaya, Kuala Lumpur 50603, Malaysia
2. Centre for Natural Products Research and Drug Discovery (CENAR), Universiti Malaya, Kuala Lumpur 50603, Malaysia
3. School of Pharmacy, Monash University Malaysia, Bandar Sunway 47500, Malaysia
4. Institut de Chimie des Substances Naturelles, CNRS-ICSN UPR2301, University Paris-Saclay, CEDEX, 91198 Gif-sur-Yvette, France
5. Department of Chemistry, Faculty of Science, Universiti Malaya, Kuala Lumpur 50603, Malaysia