1. Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
2. Department of Science and Mathematics, Faculty of Industry and Technology, Rajamangala University of Technology Isan, Sakon Nakhon, Thailand
3. Natural Products Research Unit, Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand