1. Graduate School of Science and Technology and Department of Chemistry and Chemical Engineering, Niigata University, Ikarashi, 2-8050, Niigata, 950-2181, Japan, Kobe Natural Products and Chemicals Co., Ltd., 527 Nishikawanabe Ichikawa-Cho Kanzaki-Gun Hyogo 679-2315, Japan, Division of Molecular Pharmacology, Cancer Chemotherapy Center, Japanese Foundation for Cancer Research, 1-37-1 Kami-Ikebukuro, Toshima-Ku, Tokyo 170-8455, Japan, and Institute of Molecular and Cellular Biosciences, University of Tokyo,...