Medicinal Foodstuffs. XVII. Fenugreek Seed. (3). Structures of New Furostanol-Type Steroid Saponins, Trigoneosides Xa, Xb, XIb, XIIa, XIIb, and XIIIa, from the Seeds of Egyptian Trigonellafoenum-graecum L.
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説明
Six new furostanol-type steroid saponins called trigoneosides Xa, Xb, XIb, XIIa, XIIb, and XIIIa were isolated from the seeds of Egyptian Trigonella foenum-graecum L. (Leguminosae) together with six known furostanol-type steroid saponins : trigoneosides Ia, Ib, and Va, glycoside D, trigonelloside C, and compound C. The structures of trigoneosides Xa, Xb, XIb, XIIa, XIIb, and XIIIa were determined on the basis of chemical and physicochemical evidence as 26-O-β-D-glucopyranosyl-(25S)-5α-furostane-2α, 3β, 22ξ, 26-tetraol 3-O-α-L-rhamnopyranosyl(1→2)-β-D-glucopyranoside, 26-O-β-D-glucopyranosyl-(25R)-5α-furostane-2α, 3β, 22ξ, 26-tetraol 3-O-α-L-rhamnopyranosyl(1→2)-β-D-glucopyranoside, 26-O-β-D-glucopyranosyl-(25R)-5α-furostane-2α, 3β, 22ξ, 26-tetraol 3-O-β-D-xylopyranosyl(1→4)-β-D-glucopyranoside, 26-O-β-D-glucopyranosyl-(25S)-furost-4-ene-3β, 22ξ, 26-triol 3-O-α-L-rhamnopyranosyl(1→2)-β-D-glucopyranoside, 26-O-β-D-glucopyranosyl-(25R)-furost-4-ene-3β, 22ξ, 26-triol 3-O-α-L-rhamnopyranosyl(1→2)-β-D-glucopyranoside, and 26-O-β-D-glucopyranosyl-(25S)-furost-5-ene-3β, 22ξ, 26-triol 3-O-α-L-rhamnopyranosyl(1→2)-[β-D-glucopyranosyl(1→3)-β-D-glucopyranosyl(1→4)]-β-D-glucopyranoside, respectively.
収録刊行物
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- ＣＨＥＭＩＣＡＬ ＆ ＰＨＡＲＭＡＣＥＵＴＩＣＡＬ ＢＵＬＬＥＴＩＮ
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ＣＨＥＭＩＣＡＬ ＆ ＰＨＡＲＭＡＣＥＵＴＩＣＡＬ ＢＵＬＬＥＴＩＮ 48 (7), 994-1000, 2000
公益社団法人 日本薬学会
