1. Tianjin Key Laboratory of Molecular Optoelectronic Science; Department of Chemistry; School of Science; Tianjin University; Tianjin 300072 P. R. China
2. Institute for Molecular Design and Synthesis; School of Pharmaceutical Science and Technology; Tianjin University; Tianjin 300072 P. R. China
3. School of Pharmacy; Tianjin Medical University; Tianjin 300070 P. R. China