Structures of New Flavonoids, Sophoradochromene and Sophoranochromene, from Sophora subprostrata
نویسندگان
چکیده
منابع مشابه
Tyrosinase inhibitory prenylated flavonoids from Sophora flavescens.
For the purpose of the development of a skin-whitening agent, Sophora flavescens was evaluated for tyrosinase inhibitory activity and its active principles were identified following activity-guided isolation. The ethanol extract and dichloromethane fraction from S. flavescens showed significant inhibition of mushroom tyrosinase. From the dichloromethane fraction, three known prenylated flavonoi...
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The crude polysaccharide SSa, obtained from the roots of Sophora subprostrata by boiling-water extraction and ethanol precipitation, was fractionated by anion-exchange and gel permeation chromatography, giving four polysaccharide fractions termed SSa1, SSa2, SSa3, and SSa4. Their structural features were investigated by sugar analysis, methylation analysis, partial hydrolysis, and NMR spectrosc...
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Acyl-coenzyme A:cholesterol acyltransferase (ACAT, EC 2.3.1.26) is the primary cellular enzyme that catalyzes the formation of cholesteryl esters from cholesterol and fatty acyl-coenzyme A. It has been identified that two isoenzymes, ACAT-1 and ACAT-2, have different cell locations, membrane orientations, and metabolic functions. Atherosclerotic lesions are associated with the accumulation of c...
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Flavonoids from Sophora flavescens were selectively extracted by mechanochemical-promoted extraction technology (MPET) after using response surface methodology to determine the optimal extraction parameters. The highest yield of 35.17 mg/g was achieved by grinding the roots with Na₂CO₃ (15%) at 440 rpm/min for 17.0 min and water was used as the sole solvent with a ratio of solvent to solid mate...
متن کاملTwo New Prenylated Flavonoids From Paracalyx Scariosa
Two new prenylated flavonoids, named scariosin (1) and isorhynchospermin (2) were isolated from the leaves of paracalyx scariosa together with kaempferol, quercetin, kaempferol 3-O- rutinoside and rutin. The structures of (1) and (2) were characterized as 8-C- prenyl- taxifolin 7,3'-dimethylether and 6-C-prenylquercetin 7,4'-dimethylether by their chemical and spectra data, respectively.
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1969
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.17.1302