1. The
Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, P. R. China
2. State
Key Laboratory of Molecular Developmental Biology, Institute of Genetics
and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, P. R. China
3. State
Key Laboratory of Phytochemistry and Plant Resources in West China,
Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, P. R. China