1. School of Agricultural and Life Sciences, University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan
2. Central Laboratories for Key Technologies, Kirin Company Limited, Fukuura 1-13-5, Yokohama, Kanagawa 236-0004, Japan
3. Laboratory of Biometabolic Chemistry, School of Health Sciences, Faculty of Medicine, University of Ryukyus, 1207 Uehara, Nishihara, Okinawa 903-0215, Japan
4. College of Bioresource Sciences, Nihon University, 1186 Kameino, Fujisawa, Kanagawa 252-0880, Japan