1. Natural Products Programme, Institute of Fundamental Studies, Kandy, Sri Lanka
2. Faculty of Applied Sciences, South Eastern University of Sri Lanka, Oluvil, Sri Lanka
3. H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
4. Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia