1. Department College of Tobacco ScienceGuizhou University Guiyang 550025 (P. R. China
2. Key Laboratory of TobaccoQuality in Guizhou Province Guiyang 550025 (P. R. China
3. Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province Guiyang 550025 (P. R. China
4. The Engineering and Research Center for Southwest Bio-Pharmaceutical Resources of NationalEducation Ministry of China Guizhou University Guiyang 550025 (P. R. China