1. Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand
2. Laboratory of Natural Products Chemistry, Faculty of Science and Technology, Phuket Rajabhat University, Muang, Phuket, Thailand
3. Department of Biochemistry, Faculty of Medicine, Srinakharinwirot University, Bangkok, Thailand
4. Natural Product Research Center of Excellence, Prince of Songkla University, Hat Yai, Songkhla, Thailand