نتایج جستجو برای: 5 hydroxy flavone
تعداد نتایج: 1238016 فیلتر نتایج به سال:
Two new polyketides: 2Z-(heptadec-12-enyl)-4-hydroxy-3,4,7,8-tetrahydro-2H-chromen-5(6H)-one (1) and 2-(heptadec-12-enyl)-5-hydroxy-5,6,7,8-tetrahydrochromen- 4-one (2), together with eleven known compounds: 4-hydroxy-2-[(3,4-methylenedioxy- phenyl)tridecanoyl] cyclohexane-1,3-dione (3), oleiferinone (4), 4-hydroxy-2-[(3,4- methylenedioxyphenyl)undecanoyl]cyclohexane-1,3-dione (5), 4-hydroxy-2-...
Flavone compounds present as secondary metabolites in many plants have beneficial phytochemical activity. Isolation of flavones from various parts has been widely carried out, but the synthesis pathway is another way to obtain higher yields. This research aimed synthesize flavone vanillin and 2-hydroxyacetophenone through chalcone intermediates produce a 74% yield using an iodide catalyst. new ...
In young plants of Eucalyptus globulus the leaves are covered with a whitish epicuticular layer. This leaf wax contains small amounts of C-methylated flavones as aglycones. A novel flavone has now been identified as 5,4'-dihydroxy, 7-methoxy, 6-methyl-flavone (8-desmethyl-sideroxylin). Another minor external flavone is chrysin. On leaves of E. sieberi the flavanone pinocembrin could be detected...
5-Aminosalicylic acid (5-ASA) is an effective drug for the treatment of ulcerative colitis and Crohn's disease. A large group of flavonoids was investigated for their inhibitory effects on the N-acetyl-conjugation of 5-ASA in rat hepatocytes and subcellular preparations. When added to cultured hepatocytes, some flavonoids inhibited the production of N-acetyl-5-aminosalicylic acid (5-AcASA) with...
The metabolism of the mutagen and carcinogen, 5-nitroacenaphthene, by the 9000 x g supernatant from the livers of Aroclor-pretreated rats was studied. The major primary metabolites were 1-hydroxy-5-nitroacenaphthene and 2-hydroxy-5-nitroacenaphthene. These metabolites were oxidized to 1-oxo-5-nitroacenaphthene and 2-oxo-5-nitroacenaphthene, hydroxylated to cis-1,2-dihydroxy-5-nitroacenaphthene ...
Condensation and cyclization of 5-hydroxy- 1,2,4- thiadiazol-2-yl hydrazine 1 with pyruvic acid, phenacyl bromide, propargyl bromide and ally1 bromide afforded compounds 2,5,7 3, 4 ,6 and 8 respectively, Reaction of 1 with epichforohydrine afforded 4-hydroxy-N-[5-hydroxy- 1 ,3,4-thiadiazoly1] pyrazolidine 9
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