1. Graduate School of Biological Sciences; Nara Institute of Science and Technology; 8916-5 Takayama Ikoma Nara 630-0192 Japan
2. Department of Pharmaceutical Chemistry; Faculty of Pharmacy; Universitas Gadjah Mada; Yogyakarta 55281 Indonesia
3. Department of Pharmacology and Toxicology; Kyushu University; 3-1-1 Maidashi Higashi-ku Fukuoka 812-8582 Japan