1. State
Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300353, P. R. China
2. College
of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, P. R. China
3. State
Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin 300071, P. R. China