1. Center for Drug Delivery Systems Shanghai Institute of Materia Medica Chinese Academy of Sciences Shanghai 201203 China
2. School of Pharmacy University of Chinese Academy of Sciences Beijing 100049 China
3. State Key Laboratory of Ophthalmology Zhongshan Ophthalmic Center Sun Yat‐sen University Guangzhou 510060 China
4. NMPA Key Laboratory for Quality Research and Evaluation of Pharmaceutical Excipients National Institutes for Food and Drug Control No. 2 Tiantan Xili Beijing 100050 China