Abstract
Five sterylglycosides (acylmono-, mono-, di tri- and tetraglycosylsterol) and a saponin were isolated from Adzuki beans and characterized. In the glycosylsterols, the principal component sterols were sitosterol and stigmasterol; the major sugar component was glucose. The glucose units were shown to be linked by β1,6-bonds. The three oligoglycosylsterols were shown to be gentiobiosylsterol, gentiotriosylsterol and gentiotetraosylsterol; the latter two are novel sterylglycosides. The saponin was identified as glucopyranosyl-(β1→2)-glucopyranurosyl-(β1→3′)-soyasapogenol B (Azukisaponin I) which had previously been found in Adzuki beans.
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Abbreviations
- AG1ST:
-
acylmonoglycosy Isterol
- FD-MS:
-
field desorption-mass spectrometry
- G2SA:
-
diglycosyl type of Adzuki bean saponins
- G1ST:
-
monoglycosylsterol
- G2-5ST, di-, tri:
-
tetra-, pentaglycosylsterol
- GC-MS:
-
gas chromatography-mass spectrometry
- GLC:
-
gas-liquid chromatography
- IR:
-
infrared
- PMR:
-
proton magnetic resonance
- TLC:
-
thin-layer chromatography
- TMS:
-
trimethylsilyl
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Kojima, M., Ohnishi, M., Ito, S. et al. Characterization of acylmono-, mono-, di-, tri- and tetraglycosylsterol and saponin in Adzuki bean (Vigna angularis) seeds. Lipids 24, 849–853 (1989). https://doi.org/10.1007/BF02535758
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DOI: https://doi.org/10.1007/BF02535758