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  • Title: Bioactive saponins and glycosides. I. Senegae radix. (1): E-senegasaponins a and b and Z-senegasaponins a and b, their inhibitory effect on alcohol absorption and hypoglycemic activity.
    Author: Yoshikawa M, Murakami T, Ueno T, Kadoya M, Matsuda H, Yamahara J, Murakami N.
    Journal: Chem Pharm Bull (Tokyo); 1995 Dec; 43(12):2115-22. PubMed ID: 8582013.
    Abstract:
    E-Senegasaponins a, b, and c were isolated from Senegae Radix, the root of Polygala senega L. var. latifolia TORREY et GRAY, together with their Z-isomers of the 4"-methoxycinnamoyl moiety, Z-senegasaponins a, b, and c. The structures of E-senegasaponins a and b and Z-senegasaponins a and b have been elucidated on the basis of chemical and physicochemical evidence, and the geometrical isomeric structure of the 4"-methoxycinnamoyl group in each saponin was found to show tautomer-like behavior in methanol solution or under irradiation with fluorescent lamps. E and Z-Senegasaponins a and b were found to exhibit potent inhibitory effects on alcohol absorption and hypoglycemic activity in the oral D-glucose tolerance tests in rats, and some structure-activity relationships of the acylated bisdesmoside-type saponins were clarified.
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