1. Key Laboratory of Chemistry of Northwestern Plant Resources; Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences; Lanzhou 730000 People's Republic of China
2. Key Laboratory for Natural Medicine of Gansu Province; Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences; Lanzhou 730000 People's Republic of China
3. Graduate University; Chinese Academy of Sciences; Beijing 100049 People's Republic of China
4. State Key Laboratory of Gansu Advanced Nonferrous Metal Materials; Lanzhou University of Technology; Lanzhou 730050 China