1. Department of Microbiology, Faculty of Science and Natural Product Research Center of Excellence, Excellence Research Laboratory on Natural Products, Prince of Songkla University, Hat Yai, Songkhla, Thailand;
2. Department of Physics, Faculty of Science, Prince of Songkla University, Songkhla, Thailand;
3. Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Songkhla, Thailand;
4. Department of Pathology, Faculty of Medicine, Clinical Microbiology Unit, Prince of Songkla University, Hat Yai, Songkhla, Thailand