1. College of Tobacco Science, Yunnan Agricultural University, Kunming, China
2. Key Laboratory of Medicinal Chemistry for Natural Resources, Chemistry School of Chemical Science and Technology, Yunnan University, Kunming, P.R. China
3. Yuxi Branch of Yunnan Tobacco Company, Yuxi, China
4. Technology Center of China Tobacco Yunnan Industrial Co., Ltd, Kunming, China
5. Key Laboratory of Sustainable Utilization of Plateau Characteristic Spice Plant Resources, Education Department of Yunnan Province, Yunnan, China