Saponin and Sapogenol. XLIII. : Acetyl-soyasaponins A_4,A_5,and A_6,New Astringent Bisdesmosides of Soyasapogenol A, from Japanese Soybean, the Seeds of Glycine max MERRILL.

概要

論文の詳細を見る
In addition to soyasaponins I, II, and III, three new bitter and astringent bisdesmosides named acetyl-soyasaponin A_4(2), acetyl-soyasaponin A_5 (3), and acetyl-soyasaponin A_6 (4) which are characterized by having a fully acetylated terminal xylosyl moiety, have been isolated from a Japanese species of soybean (Tamanishiki strain), the seeds of Glycine max MERRILL, cultivated in Hokkaido Prefecture. By means of photochemical degradation (a selective cleavage method for the glucuronide linkage), and on the basis of physicochemical evidence including ^1H- and ^<13>C-nuclear magnetic resonance analysis, the structures of acetyl-soyasaponins A_4,A_5,and A_6 have been elucidated as 3-O-[β-D-glucopyranosyl(1→2)-β-D-galactopyranosyl(1→2)-β-D-glucuronopyranosyl]-22-O-[2,3,4-tri-O-acetyl-β-D-xylopyranosyl(1→3)-α-L-arabinopyranosyl]soyasapogenol A (2), 3-O-[β-D-galactopyranosyl(1→2)-β-D-glucuronopyranosyl]-22-O-[2,3,4-tri-O-acetyl-β-D-xylopyranosyl(1→3)-α-L-arabinopyranosyl]soyasapogenol A (3), and 3-O-[α-L-arabinopyranosyl-(1→2)-β-D-glucuronopyranosyl]-22-O-[2,3,4-tri-O-acetyl-β-D-xylopyranosyl(1→3)-α-L-arabinopyranosyl]soyasapogenol A (4), respectively.
公益社団法人日本薬学会の論文
1988-08-25