1. Flavors and Fragrance Engineering & Technology Research Center of Henan Province; College of Tobacco Science; Henan Agricultural University; 95, Wenhua Road 450002 Zhengzhou P. R. China
2. State Key Laboratory Base of Eco-Chemical Engineering; College of Chemistry and Molecular Engineering; Qingdao University of Science & Technology; 53, Zhengzhou Road 266042 Qingdao P. R. China