1. State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, P.R. China
2. Heilongjiang University of Chinese Medicine, Harbin 150040, P.R. China
3. Harbin University of Commerce, Harbin 150040, P.R. China
4. College of Chemistry and Chemical Engineering, Bohai University, Jinzhou 121003, P.R. China