1. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China 400044
2. College of Pharmacy, Heze University, Heze, Shandong, China 274000
3. The Eighth Middle-School, Shapingba District, Chongqing, China 400030
4. College of Chemistry, Chongqing Normal University, Chongqing, China 401331