1. Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, 2630 Sugitani, Toyama 930-0194, Japan, Laboratory of Chemistry, Toyama Medical and Pharmaceutical University, 2630 Sugitani, Toyama 930-0194, Japan, X-ray Research Laboratory, Rigaku Co., 3-9-12 Matsubara-cho, Akishima 196-8666, Japan, and Simpson Biotech Co., Ltd., 1-1 Wen Min 2nd Street, Kuei Shan Hsiang, Taoyuan County, 333 Taiwan, Republic of China