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Isolation and identification of diglycerides from medium-chain triglycerides
  
DOI：10.19902/j.cnki.zgyz.1003-7969.230186
KeyWord:medium-chain triglycerides  diglycerides  isolation  identification
FundProject:广东省科技计划项目“广东省药用脂质重点实验室”（2023B1212070030）
Author NameAffiliation
WANG Guocai, TANG Shunzhi, YUAN Cheng, LI Jirong, MU Xiaonan, XU Wendong (Guangdong Provincial Key Laboratory of Medicinal Lipid, National Engineering Research Center of Pharmaceutical Processing Technology of Traditional Chinese Medicine and Drug Innovation, Guangzhou Hanfang Pharmaceutical Co. , Ltd. , Guangzhou 510006, China) 
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Abstract:
      To clarify the chemical composition of diglycerides impurities, a major by-product in medium-chain triglycerides products, diglycerides were isolated from medium-chain triglycerides through silica gel column and semipreparative high performance liquid chromatography, and the structures of diglycerides were identified. The results showed that six diglycerides (DG-1-DG-6) were isolated from medium-chain triglycerides, and the structures of DG-1-DG-6 were identified as 1,3-dicaprylin glycerate, 1,2-dicaprylin glycerate, 1,3-caprylin, caprin glycerate, 1,2-caprylin, caprin glycerate, 1,3-dicaprin glycerate, 1,2-dicaprin glycerate by nuclear magnetic spectrum, mass spectrum, IR spectrum, ultraviolet spectrum, and gas chromatography. Knowing the structure of diglycerides in medium-chain triglycerides is conducive to the quality control and clinical application of medium-chain triglycerides.
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