منابع مشابه
Antimicrobial Activity of Five Endemic Asperula Species from Turkey
In this study, methanol and ether extracts of five endemic Asperula species (Rubiaceae) from Turkey (A. antalyensis, A. brevifolia, A. pseudochlorantha, A. purpurea subsp. apiculata and A. serotina), used in the traditional system of medicine, were tested for antimicrobial activity by the agar well diffusion method and the broth dilution method. The most active species were Asperula brevifolia ...
متن کاملAntimicrobial Activity of Five Endemic Asperula Species from Turkey
In this study, methanol and ether extracts of five endemic Asperula species (Rubiaceae) from Turkey (A. antalyensis, A. brevifolia, A. pseudochlorantha, A. purpurea subsp. apiculata and A. serotina), used in the traditional system of medicine, were tested for antimicrobial activity by the agar well diffusion method and the broth dilution method. The most active species were Asperula brevifolia ...
متن کاملAntioxidant and cytotoxic flavonols from Calotropis procera.
Phytochemical investigations of Calotropis procera leaves have led to the isolation of two new compounds: quercetagetin-6-methyl ether 3-O-beta-D-4C1-galacturonopyranoside (3) and (E)-3-(4-methoxyphenyl-2-O-beta-D-4C1 -glucopyranoside)-methyl propenoate (4), along with eleven known metabolites: nine flavonol and two cinnamic acid derivatives. All metabolites were isolated for the first time fro...
متن کاملThe quantitation of metabolites of quercetin flavonols in human urine.
The flavonoid quercetin, or its metabolites, inhibit chemical carcinogenesis in rodents and may have a role in the prevention of human cancers. Quercetin exposure in human populations results from the dietary intake of various plant foods; high concentrations of quercetin are found in apples, onions, tea, and red wine. Determination of the relationship between dietary intake and cancer risk dep...
متن کاملPolymethylated Flavonols of Chrysosplenium americanum I. Identification and Enzymatic Synthesis
Polymethylated Flavonols, Identification, Enzymatic Synthesis, O-Methyltransferase, Chrysosplenium americanum, Saxifragaceae The major flavonoid constituents of Chrysosplenium americanum (Saxifragaceae) were identi fied by UV-, NMRand mass spectroscopy and the analysis of their hydrolytic products. They consisted of two 2'-0-/?-D-glucosides of partially methylated 2'-hydroxyquercetin and four ...
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ژورنال
عنوان ژورنال: Chemistry of Natural Compounds
سال: 1973
ISSN: 0009-3130,1573-8388
DOI: 10.1007/bf00564403