1. School of Pharmacy, East China University of Science and Technology, Shanghai 200237, P.R. China
2. Department of Medicinal Chemistry, School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, P.R. China
3. Department of Chemistry and Chemical Biology, University of New Mexico, MSC03 2060, Albuquerque, New Mexico 87131-0001, United States