GC-MS separation and determination of 20 amino acids in biological samples based on ethyl chloroformate second derivation
1. Modern Research Center for Traditional Chinese Medicine, Shanxi University, Taiyuan 030006, China
2. College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
3. Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Shanxi University, Taiyuan 030006, China
4. Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
5. University of Louisville, Louisville 40292, USA
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