title: [Study on chemical changes of salvianolic acid B and lithospermic acid aqueous under conditions of high temperature and high pressure].
abstract: OBJECTIVE
  To study the chemical changes of salvianolic acid B and lithospermic acid of Salvia miltiorrhiza under the conditions of high temperature and high pressure and explore the reaction mechanism.
  
  
  METHODS
  S. miltiorrhiza extracts, salvianolic acid B and lithospermic acid were put in the reactor under the conditions of high temperature and high pressure (120 degrees C, 0.2 MPa), and the chemical changes and stability was studied.
  
  
  RESULTS
  Salvianolic acid A was the primary product in salvianolic acid B and lithospermic acid's conversion process, and lithospermic acid was an intermediate in the conversion process of salvianolic acid B. Compared with salvianolic acid B, lithospermic acid could convert into more salvianolic acid A and fewer other products in the same conditions. Salvianolic acid A was not stable under the conditions of high temperature and high pressure, and could sequentially convert into other small molecules.
  
  
  CONCLUSIONS
  Referring to the chemical conversion of salvianolic acid B and lithospermic acid, a method of large-scale preparation of salvianolic acid A can be developed.
authors: School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China. wydlpu@163.com
authors: Ying
authors: Y
authors: Wang
authors: Jingbo
authors: J
authors: Zhu
authors: Shaoping
authors: S
authors: Fu
authors: Linmin
authors: L
authors: Zhu
authors: Yi
authors: Y
authors: Zhang