1. College of Pharmaceutical Sciences Southwest University Chongqing 400715 China
2. Analytical Instruments Department Analytical Applications Center Shimadzu (China) Co., Ltd. Chongqing Branch Chongqing 404100 China
3. Department of Pharmaceutical Sciences University of Milan Milan 20133 Italy
4. Huaxi MR Research Center (HMRRC) Department of Radiology Function & Molecular Imaging Key Lab Sichuan University Chengdu 610041 China