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• 95753-66-5 C₅₉H₁₀₀O₂₀ 
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Relevant academic research and scientific papers

THE STRUCTURE OF PROSAPOGENIN OBTAINED FROM THE SAPONIN OF GLEDITSIA JAPONICA

Key Word Index - Gleditsia japonica; Leguminosae; saponins; bisdesmoside; echinocystic acid derivatives; Gleditsia saponin C. Prosapogenin was obtained by alkaline hydrolysis of Gleditsia saponin GS-C (echinocystic acid 3,28-O-bisdesmoside), a new triterpenoid saponin isolated from Gleditsia japonica.Prosapogenin was shown on the basis of chemical and physicochemical data to be echinocystic acid 3-O-β-D-xylopyranosyl-(1-2)-α-L-arabinopyranosyl-(1-6)-β-D-glucopyranoside.

Studies on the Constituents of Aceraceae Plants. V. Two Diarylheptanoid glycosides and an Arylbutanol Apiosylglucoside from Acer nikoense

From the stem bark of Acer nikoense Maxim. (Aceraceae), three glycosides were isolated, namely aceroside III (1), C30H40O12, mp 138-141 deg C, D -98.4 deg, aceroside VI (2), C25H32O8*1/2H2O, mp 124-125 deg C, D -69.3 deg, and apiosylepirhododendrin (3), amorphous film (C21H32O11), D -59.5 deg.On acid hydrolysis, 1 yielded acerogenin A (4), apiose, glucose, and a partially hydrolyzed product 2, while 3 afforded (+)-rhododendrol (11), apiose, and glucose.Inspection of the carbon-13 nuclear magnetic resonance (13C NMR) and the PRFT-NMR spectra of 1 and 3 disclosed that they are apiosyl-(1->6)-glucosides.The proton nuclear magnetic resonance (1H NMR) spectral data of their permethylates (6 and 12) and the analytical data of methanolysis products of 6 and 12 established the structures of 1, 2 and 3 as acerogenin A 11-O-β-D-apiofuranosyl-(1->6)-β-D-glucopyranoside, acerogenin A 11-O-β-D-glucopyranoside and (+)-rhododendrol 2-O-β-D-apiofuranosyl-(1->6)-β-D-glucanopyranoside, respectively.Keywords - Acer nikoense; Aceraceae; diarylheptanoid; arylbutanol; apiosylglucoside; aceroside (III, VI); apiosylepirhododendrin; (+)-rhododendrol; PRFT-NMR