[1] Zhengzhou Univ, Sch Pharmaceut Sci, Zhengzhou 450001, Henan, Peoples R China
[2] Univ Wisconsin, Div Pharmaceut Sci, Madison, WI 53705 USA
[3] Univ Wisconsin, Dept Chem, Sch Pharm, Madison, WI 53705 USA
[4] Tianjin Univ, Sch Pharmaceut Sci & Technol, Key Lab Modern Drug Delivery & High Efficiency, Tianjin 300072, Peoples R China