1. Graduate School of Pharmaceutical Sciences and Center for Instrumental Analysis, Hokkaido University, Sapporo 060-0812, Japan, Research Laboratory, Higeta Shoyu Co., Ltd., Chiba 288-8680, Japan, Research Center for Pathogenic Fungi and Microbial Toxicoses, Chiba University, Chiba 260-0856, Japan, and Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-0845, Japan