1. Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand, Institute of Science and Technology for Research and Development, Mahidol University, Salaya, Nakhonphatom 73170, Thailand, Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan, and Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, 565-0871, Japan