1. Key Laboratory of Preclinical Study for New Drugs of Gansu ProvinceInstitute of Drug Design & SynthesisInstitute of PharmacologySchool of Basic Medical SciencesLanzhou University 199 West Donggang Rd Lanzhou 730000 Gansu P. R. China
2. Guangdong Key Lab of Nano-Micro Material ResearchSchool of Chemical Biology and BiotechnologyPeking University Shenzhen Graduate School Shenzhen 518055 China
3. School of Pharmaceutical SciencesSun Yat-sen University Guangzhou 510006 P. R. China