1. Department of Pharmaceutics, College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi 712046, P.R. China
2. Shaanxi Province Key Laboratory of New Drugs and Chinese Medicine Foundation Research, College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi 712046, P.R. China
3. Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang, Jiangxi 330004, P.R. China