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Secondary-emission mass spectrometry of hederagenin glycosides and medicagenic acid glycosides

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Abstract

The secondary emission (SE) spectra of six glycosides of medicagenic acid (MA) and of hederagenin have been studied. The (M + H)+ ions were observed in the secondary ion spectra (LSIMS) of mono- and biosides of MA and also of a triand a tetraoside of hederagenin in a glycerol matrix. The (M + Na)+ ions were recorded in the spectra of tri- and tetraosides of MA. In the majority of cases processes involving the successive splitting out of the carbohydrate units were revealed. Positive- and negative-ion spectra have been obtained on the ionization by bombardment with fast atoms — FAB “+” and FAB “−” — of a trioside and a tetraoside of MA. The FAB “−” spectra are the most characteristic: They show intense peaks of the (M - H)− ions and of the products of the sequential elimination of the sugar residues.

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Authors
  1. Yu. M. Mil'grom
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  2. Ya. V. Rashkes
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  3. A. É. Timbekova
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Additional information

Institute of the Chemistry of Plant Substances, Uzbekstan Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 98–102, January–February, 1992.

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Mil'grom, Y.M., Rashkes, Y.V. & Timbekova, A.É. Secondary-emission mass spectrometry of hederagenin glycosides and medicagenic acid glycosides. Chem Nat Compd 28, 82–85 (1992). https://doi.org/10.1007/BF00629799

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  • DOI: https://doi.org/10.1007/BF00629799

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