Journal
JOURNAL OF NATURAL PRODUCTS
Volume 81, Issue 8, Pages 1734-1744Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jnatprod.8b00022
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European licorice roots (Glycyrrhiza glabra), used in the food and beverage industry due to their distinctive sweet and typical licorice flavor, were fractionated, with the triterpenoid saponins isolated and their chemical structures determined by means of ESIMS, ESIMS/MS, HRESIMS, and 1D/2D NMR experiments. Next to the quantitatively predominant saponin glycyrrhizin (11) and some previously known saponins, the structures of 10 monodesmosidic saponins were assigned unequivocally for the first time, namely, 30-hydroxyglycyrrhizin (1), glycyrrhizin-20-methanoate (2), 24-hydroxyglucoglycyrrhizin (3), rhaoglycyrrhizin (4), 11-deoxorhaoglycyrrhizin (5), rhaoglucoglycyrrhizin (6), rhaogalactoglycyrrhizin (7), 11-deoxo-20 alpha-glycyrrhizin (8), 20 alpha-galacturonoylglycyrrhizin (9), and 20 alpha-rhaoglycyrrhizin (10).
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