1. Laboratory of Magnetic Resonance Spectroscopy and Imaging, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China
2. School of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, P.R. China
3. Crystal Pharmaceutical (Suzhou) Co., Ltd., Suzhou Industrial Park, Suzhou 215123, P. R. China