1. Department of Pharmacognosy and Phytochemistry, Meiji Pharmaceutical University, Noshio 2-522-1, Kiyose-shi, Tokyo 204-8588, Japan
2. Department of Analytical Biochemistry, Meiji Pharmaceutical University, Noshio 2-522-1, Kiyose-shi, Tokyo 204-8588, Japan
3. Department of Genome Biology, Kinki University School of Medicine, Ohno-Higashi 377-2, Osaka-Sayama-shi, Osaka 589-8511, Japan
4. Department of Microbiology, Meiji Pharmaceutical University, Noshio 2-522-1, Kiyose-shi, Tokyo 204-8588, Japan
5. X-ray Research Laboratory, Rigaku Corporation, Matsubara-cho 3-9-12, Akishima-shi, Tokyo 196-8666, Japan