1. State
Key Laboratory of Phytochemistry and Plant Resources in West China,
Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People’s Republic of China
2. Department
of Chemistry and Pharmacy, Ludwig-Maximilians-University Munich, Butenandstrasse
5-13, 81377 Munich, Germany
3. Graduate University of Chinese Academy of Sciences, Beijing 100039, People’s Republic of China