1. Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, (Ministry of Education of China), College of Chemistry and Chemical Engineering; Hunan Normal University; Changsha Hunan 410081 People's Republic of China
2. School of Pharmaceutical and Chemical Engineering; Taizhou University, 1139 Shifu Road; Linhai Zhejiang 318000 People's Republic of China
3. Beijing Kein Research Center for Natural Sciences; Beijing 100022 People's Republic of China
4. Research Computing Center, University of North Carolina; Chapel Hill North Carolina 27599-3420