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Gmelinosides A-L, twelve acylated iridoid glycosides from Gmelina arborea.
TLDR
12 new acylated iridoid glycosides named gmelinosides A-L have been isolated from the leaves of Gmelina arborea and were structurally characterized using a variety of spectral methods.
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Microbial Hydroxylation and Methylation of Genistein by Streptomycetes
Streptomyces griseus (ATCC 10137) and Streptomyces catenulae (ATCC 23893) were used to convert genistein5,7,4‘-trihydroxyisoflavone (1)a major isoflavone found in soybeans, into five metabolites,…
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Novel oxidations of (+)-catechin by horseradish peroxidase and laccase.
  • M. Hosny, J. Rosazza
  • Chemistry, Biology
    Journal of agricultural and food chemistry
  • 17 August 2002
TLDR
Horseradish peroxidase and laccase oxidation products were compared to D,L-alpha-tocopherol and (+)-catechin for their abilities to inhibit iron-induced lipid peroxidation in rat brain homogenates and Fe(3+)-ADP/NADPH in rat liver microsomes, as measured by the intensity of thiobarbituric acid reactive substance.
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Novel isoflavone, cinnamic acid, and triterpenoid glycosides in soybean molasses.
TLDR
Several new compounds were isolated and identified, including three isoflavones (1-3), two cinnamic acid ester glycosides (11) and (12), and a new saponin hexaglycoside (13).
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A New Flavonoid C-Glycoside from Celtis australis L. and Celtis occidentalis L. Leaves and Potential Antioxidant and Cytotoxic Activities
TLDR
This study provides strong evidence for the antioxidant and cytotoxic activities of the extracts of Celtis australis L. and Celtis occidentalis L. leaves, which were attributed to the polar n-butanol fractions and the major isolated flavonoid 2″-galactosylvitexin.
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(−)-Catechin glycosides from Ulmus davidiana
TLDR
Five hitherto unknown compounds together with a known one (−)-catechin 1 are identified in the n-BuOH soluble fraction obtained from the stem and root barks of U. davidiana.
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Hydroxylations and methylations of quercetin, fisetin, and catechin by Streptomyces griseus.
TLDR
Nine known hydroxylated and/or methylated metabolites and two previously unknown metabolites were isolated from Streptomyces griseus and appeared to occur only when catechol functional groups were present.
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New isoflavone and triterpene glycosides from soybeans.
TLDR
Cytotoxic activities of various extracts and selected isoflavonoids and saponins were measured against human stomach carcinoma, breast adenocarcinoma, and prostate carcinoma cell lines, indicating the importance of the 2,3-double bond in cytotoxicity.
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Balanitoside, a furostanol glycoside, and 6-methyldiosgenin from Balanites aegyptiaca.
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Structures of Ferulic Acid Glycoside Esters in Corn Hulls
1D-NMR (1H and 13C) and 2D-NMR spectroscopy as well as chemical means have been used to determine the structures of three new feruloylated disaccharides derived from acid hydrolysis of corn hulls.…
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