1. Department of Pharmacy, Changde Vocational Technical College, Changde, Hunan 415000, China
2. 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, China
3. Beijing Kein Research Center for Natural Sciences, Beijing 100022, P. R. China
4. State Key Laboratory of Applied Organic
Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources
Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, 730000 Lanzhou, P. R. China
5. Research
Computing Center, University of North Carolina, Chapel Hill, North Carolina 27599-3420, United States