1. The
Center for Combinatorial Chemistry and Drug Discovery of Jilin University,
The College of Chemistry and The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Rd., Changchun, Jilin 130021, P. R. China
2. Beijing
National Laboratory for Molecular Sciences (BNLMS), Key Laboratory
of Bioorganic Chemistry and Molecular Engineering of Ministry of Education,
College of Chemistry, Peking University, Beijing 100871, China