1College of Bioscience and Biotechnology, Hunan Agriculture University, Changsha 410128 ,China.
2Research Center of Modernization of Chinese Traditional and Herbal Drug Modernization, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan,P. R. China.
3College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan, China.
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