1. Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, Thailand
2. Faculty of Pharmaceutical Sciences, Ubon Ratchathani University, Ubon Ratchathani, Thailand
3. School of Pharmacy, Walailak University, Nakhon Si Thammarat, Thailand
4. Biomass and Oil Palm Center of Excellence, Walailak University, Nakhon Si Thammarat, Thailand