1. Laboratory of Pharmaceutical Design and Synthesis, College of Sciences, Northwest A&F University, Yangling 712100, Shannxi Province, People’s Republic of China
2. Spice and Beverage Research Institute, Chinese Academy of Tropical Agriculture Science, Wanning
571533, Hainan Province, People’s Republic of China
3. Department of Chemistry, Lanzhou University, Lanzhou 730000, Gansu Province,
People’s Republic of China