1Research Center of Modernization of Chinese Traditional and Herbal Drug Modernization, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, Peoples Republic of China.
2College of Bioscience and Biotechnology, Hunan Agriculture University, Changsha, Hunan 410128, Peoples Republic of China.
3College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, Peoples Republic of China.
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