サポニン及びサポゲノール(第44報) : 各種大豆におけるサポニン組成とサポニンの存在部位. 大豆胚軸から得られた Soyasaponin V の化学構造

概要

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Saponin compositions in soybeans of 18 different origins were examined and it has been found that the content of acetyl-soyasaponins A_1 (8a), A_2 (9a), A_3 (10a), A_4 (11a), A_5 (12a), and A_6 (13a) [with soyasapogenol A (1) as the aglycone] varies depending upon the kind and the habitat. Saponins in seed coat, cotyledon, and hypocotyl of soybeans from U.S.A., China, and Hokkaido, were examined by thin layer chromatography and high performance liquid chromatography, and quantitatively analyzed by gas liquid chromatography. It has been found that seed coat does not contain saponin, whereas cotyledon contains saponin of soyasapogenol B (2) in 0.14-0.18% and saponin of soyasapogenol A (1) in 0.07-0.09%. It has been also found that the saponin content in hypocotyl is much higher than that in cotyledon, i.e. soyasapogenol B (2)-saponin in 0.42-0.52% and soyasapogenol A (1)-saponin in 1.25-1.46%. During these studies, a new saponin named soyasaponin V {7,3-O-[β-D-glucopyranosyl-(1→2)-β-D-galactopyranosyl-(l→2)-β-D-glucuronopyranosyl]soyasapogenol B} was isolated from hypocotyl and the structure has been determined.
公益社団法人日本薬学会の論文
1988-06-25