1. State Key Laboratory of Chemical Resource Engineering, Institute of Materia Medica, College of Science, Beijing University of Chemical Technology; Beijing 100029 China
2. Department of Chemistry; Western Michigan University; Kalamazoo Michigan 49008
3. State Key Laboratory of Physical Chemistry of Solid Surfaces and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry College of Chemistry and Chemical Engineering, Xiamen University; Xiamen 360015 China
4. The Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University; Kaifeng 475004 China
5. Department of Biochemistry; The Center for Biological Modeling, Michigan State University; East Lansing Michigan 48824
6. Department of Chemistry; The Center for Biological Modeling, Michigan State University; East Lansing Michigan 48824