1. School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, P. R. China
2. College of Pharmacy, Jinan University, Guangzhou 510006, Guangdong, P. R. China
3. Guangdong Province Key Laboratory of Utilization and Protection for Resource of Food and Medicinal Plant in North Region, Shaoguan University, Shaoguan 512005, Guangdong, P. R. China
4. Respirent Pharmaceuticals, Co., Ltd., Chongqing 400714, P. R. China
5. Institute of Advanced Drug Delivery Systems, Jinan University, Guangzhou 510006, Guangdong, P. R. China