1. CAS
Key Laboratory of Chemistry of Northwestern Plant Resources and Key
Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute
of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou 730000, People’s Republic of China
2. University of Chinese Academy of Sciences, Beijing 100039, People’s Republic of China
3. College
of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, People’s Republic of China