1. Department of Chemistry, Faculty of Engineering, Rajamangala University of Technology Isan, KhonKaen campus, Khon Kaen 40000, Thailand
2. Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
3. Natural Product Research Unit, Center of Excellence for Innovation in Chemistry, Department of Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand