1. Key Laboratory of Phytochemical R&D of Hunan Province; Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research; Ministry of Education; Hunan Normal University; Changsha P. R. China
2. Key Laboratory of Tobacco Chemistry of Yunnan Province; Research and Development of Center; China Tobacco Yunnan Industrial Co., Ltd.; Kunming P. R. China
3. College of Economics and Management; Hengyang Normal University; Hengyang P. R. China