1. State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, Yunnan, PRC, Department of Pharmacognosy, School of Pharmacy, Fudan University, 138 Yi Xue Yuan Road, Shanghai 200032, PRC, and Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, Yunnan, PRC