1. State Key
Laboratory of Phytochemistry and Plant Resources in West China, Kunming
Institute of Botany, Chinese Academy of Sciences, 132 Lanhei
Road, Kunming 650201, P. R. China
2. Department of Chemistry, Emory University, 1515
Dickey Drive, Atlanta, Georgia 30322, United States
3. University of Chinese Academy of Sciences, Beijing 100049, P. R. China