1. Graduate School of Pharmaceutical Science, Osaka University, 1-6 Yamada-oka, Suita City, Osaka 565-0871, Japan
2. Iwaki Laboratory, Kunimine Industries Co, Ltd, 23-5 Kuidesaku, Shimofunao, Iwaki, Fukushima 972-8312, Japan
3. Core Instrumentation Facility, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Suita City, Osaka 565-0871, Japan
4. Kunimine Industries Co, Ltd, 23-5 Kuidesaku, Shimofunao, Iwaki, Fukushima 972-8312, Japan