1. College of Humanities and Sciences, Nihon University, Setagaya-ku, Tokyo, Japan, 156-8550
2. School of Pharmacy, Nihon University, 7-7-1 Narashinodai, Funabashi, Chiba, Japan, 274-8885
3. Kunming Institute of Botany, Chinese Academy of Science, Kunming, China, 650204