Affiliation: | a Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand b Natural Products Research and Development Center (NPRDC), Science and Technology Research Institute (STRI), Chiang Mai University, Chiang Mai 50200, Thailand c Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Chiba, Japan d Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand |