1. a Department of Pharmacognosy , Graduate School of Pharmaceutical Sciences, Kyushu University , 3-1-1 Maidashi, Higahshi-ku, Fukuoka , 812 , Japan
2. b Department of Medicine , Graduate School of Medicine, Kyushu University , 3-1-1 Maidashi, Higahshi-ku, Fukuoka , 812 , Japan
3. c Department of Pharmacognosy , Graduate School of Pharmaceutical Sciences, Kyushu University , 3-1-1 Maidashi, Higahshi-ku, Fukuoka , 812 , Japan