Flavonols - Chemistry
Research News and Information

Sunday, November 22, 2009

A fragmentation study of dihydroquercetin using triple quadrupole mass spectrometry and its application for identification of dihydroflavonols in Citrus juices.

30 Aug 2009 A mass spectrometric method using electrospray ionization with triple quadrupole and quadrupole time-of-flight hybrid (Q-Tof) mass spectrometry has been applied to the structural characterization of dihydroflavonols. This family of compounds has ... Read more...

Simultaneous identification of glucosinolates and phenolic compounds in a representative collection of vegetable Brassica rapa.

Aug 2009 Brassica raparapa group is widely distributed and consumed in northwestern Spain. The consumption of Brassica vegetables has been related to human health due to their phytochemicals, such as glucosinolates and phenolic compounds that induce a ... Read more...

Four flavonoids from Echinosophora koreensis and their effects on alcohol metabolizing enzymes.

24 Jun 2009 A new prenylated dihydroflavonol, 3-hydroxy-kenusanone B 1, as well as three other known isoflavanones, sophoronol 2, sophoraisoflavanone A 3 and kenusanone H 4, were isolated from the rhizomes of Echinosophora koreensis. The structures of these ... Read more...

Latest indexed articles for 'Flavonols - Chemistry'

These are the very latest articles for this heading:

• A fragmentation study of dihydroquercetin using triple quadrupole mass spectrometry and its application for identification of dihydroflavonols in Citrus juices. 30 Aug 2009
• Simultaneous identification of glucosinolates and phenolic compounds in a representative collection of vegetable Brassica rapa. Aug 2009
• Four flavonoids from Echinosophora koreensis and their effects on alcohol metabolizing enzymes. 24 Jun 2009
• Hyphenation of centrifugal partition chromatography with electrospray ionization mass spectrometry using an active flow-splitter device for characterization of flavonol glycosides. 30 May 2009
• Formation of UV-honey guides in Rudbeckia hirta. 24 May 2009
• Flavonol tetraglycosides from fruits of Styphnolobium japonicum (Leguminosae) and the authentication of Fructus Sophorae and Flos Sophorae. 13 May 2009
• Arabidopsis thaliana expresses a second functional flavonol synthase. 8 May 2009
• An investigation of the fragmentation differences of isomeric flavonol-O-glycosides under different collision-induced dissociation based mass spectrometry. 29 Apr 2009
• Prenylflavonols from the leaves of Macaranga sampsonii. 29 Apr 2009
• [Dynamic change of flavonoids' content in various extent of cortex moutan carbonisatum] 30 Mar 2009
• Cytotoxic constituents of chinese propolis. 30 Mar 2009
• [Studies on the chemical constituents of Nerviliae fordii] 27 Feb 2009
• Acylated flavonol bisdesmosides, sinocrassosides A3-A7 and B3, with aminopeptidase N inhibitory activity from Sinocrassula indica. 27 Feb 2009
• Assessment of the effect of type of dairy product and of chocolate matrix on the oral absorption of monomeric chocolate flavanols in a small animal model. 27 Feb 2009
• Flavonol glycosides from Muehlenbeckia platyclada and their anti-inflammatory activity. 27 Feb 2009
• Two new flavonol glycosides from Otostegia limbata BENTH. 27 Feb 2009
• Isolation of two new prenylflavonols from Epimedium brevicornum and their effects on cytokine production in vitro. 23 Feb 2009
• Structural revision of two flavanonol glycosides from Smilax glabra. 4 Feb 2009
• Measurement of xanthine oxidase inhibition activity of phenolics and flavonoids with a modified cupric reducing antioxidant capacity (CUPRAC) method. 20 Jan 2009
• Environmental regulation of leaf colour in red 35S:PAP1 Arabidopsis thaliana. 10 Jan 2009

See a longer list of these articles.

Technical information about 'Flavonols'

Definition: A group of 3-hydroxy-4-keto-FLAVONOIDS.

Registry Number: 0

Descriptor UI: D044948

Alternative terms: Flavonols; 3-hydroxy-4-keto-Flavonoids; 3 hydroxy 4 keto Flavonoids; 2-Phenyl-3-Hydroxy-Benzopyran-4-Ones; 2 Phenyl 3 Hydroxy Benzopyran 4 Ones;

Allowable Qualifiers: administration & dosage; adverse effects; analysis; antagonists & inhibitors; biosynthesis; blood; cerebrospinal fluid; chemical synthesis; classification; deficiency; diagnostic use; economics; genetics; history; immunology; isolation & purification; metabolism; pharmacokinetics; pharmacology; physiology; poisoning; radiation effects; secretion; standards; supply & distribution; therapeutic use; toxicity; urine; chemistry; contraindications; agonists;

Tree Number: D03.438.150.266.450.284; D03.830.219.266.450.284;

History Note: 2004; for FLAVONOLS use FLAVONOLS (NM) 1977-2003