Degradation of Ginseng Saponins under Mild Acidic Conditions
- 29 March 1982
- journal article
- research article
- Published by Georg Thieme Verlag KG in Planta Medica
- Vol. 44 (03) , 146-149
- https://doi.org/10.1055/s-2007-971425
Abstract
Ginseng saponins, ginsenosides Rg1, Re and Rb1, decomposed under mild acidic conditions to yield prosapogenins. The structures of the prosapogenins were investigated by 13C-NMR spectroscopy and Rg1-prosapogenin II was shown to be a mixture of ginsenoside Rh1, and its C-20 epimer, produced by hydrolysis followed by epimerization at C-20. Rg1-prosapogenin III, the other prosapogenin derived from ginsenoside Rg1; was a C-25,26 hydrated derivative of Rg1-prosapogenin II. Re-prosapogenin II was identified as a mixture of ginsenoside Rg2 and its C-20 epimer, and Re-prosapogenine III as a C-25,26 hydrated derivative of Re-prosapogenin II.Keywords
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