soyasapogenol b/astragalus

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Triterpene glycosides from the seeds of Astragalus sinicus L.

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From the seeds of Astragalus sinicus L. (Leguminosae), seven triterpene glycosides were isolated and identified as soyasaponin I-III methyl esters (1-3) which were treated with CH2N2 during the separation procedure, soyasaponin IV (4), soyasapogenol B 3-O-beta-D-glucuronopyranoside (5),

A new oleanane glycoside from the roots of Astragalus caprinus.

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A novel oleanane-type triterpene saponin (1) together with two known molecules, soyasapogenol B and astragaloside VIII were isolated from the roots of Astragalus caprinus. Their structural elucidation was performed mainly by 2D NMR techniques (COSY, TOCSY, NOESY, HSQC, HMBC) and mass spectrometry.

Saponins from Astragalus hareftae (NAB.) SIRJ.

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Four cycloartane- (hareftosides A-D) and oleanane-type triterpenoids (hareftoside E) were isolated from Astragalus hareftae along with fifteen known compounds. Structures of the compounds were established as 3,6-di-O-β-D-xylopyranosyl-3β,6α,16β,24(S),25-pentahydroxycycloartane,

Bioactive saponins from Astragalus suberi L. growing in Yemen.

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From the aerial parts of Astragalus suberi L., Fabaceae, seven saponins were isolated. Based on spectral data (IR, 1H and 13C NMR and HR-FABMS), the structures were established as 3-O-(beta-D-glucopyranosyl)-soyasapogenol B (1); 3-O-(beta-D-glucuronopyranosyl)-soyasapogenol B (2);

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