1. State
Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, P. R. China
2. University of Chinese Academy of Sciences, Beijing 100049, P. R. China
3. Laboratory
of Cellular and Molecular Biology, Jiangsu Branch of China Academy of Traditional Chinese Medicine, Nanjing 210028, Jiangsu, P. R. China