1. Chinese National Center for Drug Screening, Shanghai Institute of Materia Medica, Shanghai Institutes for Life Sciences, Chinese Academy of Sciences, 189 Guo Shou Jing Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China, Department of Chemistry, Lanzhou University, 216 Tian Shui Road, Lanzhou, 730000, China, and High-Throughput Screening Laboratory and Molecular Graphics and Modeling Laboratory, University of Kansas, Lawrence, Kansas 66047