1. Research Group of General Chemistry (ALGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
2. Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), Hunan Normal University, Changsha 410081, Hunan, P. R. China
3. State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China
4. Research Computing Center, University of North Carolina, Chapel Hill, North Carolina 27599-3420, United States
5. Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290, United States