1. Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, Toyama 930-0194, Japan
2. Department of Surgery and Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
3. Department of Diagnostic Pathology, University of Toyama, Toyama 930-0194, Japan
4. Faculty of Engineering, University of Toyama, Toyama 930-8555, Japan
5. Graduate School of Innovative Life Science, University of Toyama, Toyama 930-8555, Japan