1. State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, People’s Republic of China
2. University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
3. Dipartimento di Chimicae Chimica Industriale, Università di Pisa, Via Moruzzi 13, 56124, Pisa, Italy