1. Institute of Microbial Chemistry (BIKAKEN), Numazu, 18-24 Miyamoto, Numazu-shi, Shizuoka 410-0301, Japan
2. Institute of Microbial Chemistry (BIKAKEN), Tokyo, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
3. Bioscience
Laboratories, Meiji Seika Pharma Ltd, 788 Kayama, Odawara-shi, Kanagawa 250-0852, Japan