1. Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education), Key Laboratory of Sustainable Resources Processing and Advanced Materials of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China
2. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
3. Research Computing Center, University of North Carolina, Chapel Hill, North Carolina 27599-3420, United States