1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, P. R. China
2. Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, P. R. China
3. School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China