1. Department of Chemistry, Faculty of Science, Prince of Songkla University, Songkhla, 90112, Thailand, Department of Microbiology, Faculty of Science, Prince of Songkla University, Songkhla, 90112, Thailand, Department of Biology, Faculty of Science, Prince of Songkla University, Songkhla, 90112, Thailand, and School of Chemistry, University of Sydney, NSW 2006, Australia