1. College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Changcheng Road #700, Qingdao 266109, PR China
2. College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Zhengzhou Road #53, Qingdao 266042, PR China
3. School of Pharmacy, Shenyang Pharmaceutical University, Hongliu Road #85, Benxi 117004, PR China