1. Departments of Pharmacognosy and Microbiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, 73/1 Rama VI Road, Rajdhevee, Bangkok 10400, Thailand, and Marine Biotechnology Research Unit, Aquatic Resource Research Institute, Chulalongkorn University, Bangkok 10330, Thailand