Category:FL

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	|FL1D||[[:Category:FL1D|Dihydrochalcone]]		|FL1D||[[:Category:FL1D|Dihydrochalcone]]
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−	|FL2||[[:Category:FL2|Flavanone]]<br>[[Image:Fl2.png|100px]]||FL2F||[[:Category:FL2F|Flavanone]]<br>   [[Image:Fl2.png|100px]]	+	|FL2||[[:Category:FL2|Flavanone]]<br>[[Image:Fl2.png|100px]]||FL2F||[[:Category:FL2F|Flavanone]]<br>[   [Image:Fl2.png|100px]]
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	|FL3||[[:Category:FL3|Flavone]]<br>[[Image:Fl3.png|100px]]||FL3F||[[:Category:FL3F|Flavone]]<br>[[Image:Fl3.png|100px]]		|FL3||[[:Category:FL3|Flavone]]<br>[[Image:Fl3.png|100px]]||FL3F||[[:Category:FL3F|Flavone]]<br>[[Image:Fl3.png|100px]]

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Revision as of 18:18, 6 March 2008

FL: Flavonoid

Structural Characteristics

Flavonoid is a class of plant secondary metabolites that have two benzene rings (each called A-ring and B-ring) connected by a chain of three carbons (Figure 1).

The carbon chain, corresponding to the numbers 2,3,4 in Figure 1, is linked to a hydroxyl group in the A-ring to form the C-ring. The class of flavonoids are usually determined by the modification pattern of the C-ring (Table 1).

1st Class		2nd Class
FL1	Aurone and Chalcone	FL1A	Aurone
		FL1B	Auronol
		FL1C	Chalcone
		FL1D	Dihydrochalcone
FL2	Flavanone	FL2F	Flavanone [ [Image:Fl2.png|100px]]
FL3	Flavone	FL3F	Flavone
FL4	Dihydroflavonol	FL4D	Dihydroflavonol
FL5	Flavonol	FL5F	Flavonol
FL6	Flavan	FL6F	Flavan
		FL63	Flavan 3-ol
		FL64	Flavan 4-ol
		FL6D	Flavan 3,4-diol
FL7	Anthocyanin	FL7A	Anthocyanin
		FL7D	3-Desoxyanthocyanin
FLI	Isoflavonoid	FLIA	Isoflavone
		FLIB	Isoflavanone
		FLIC	Isoflavan
		FLID	Pterocarpane
		FLIE	Coumestan
		FLIF	Rotenoid
		FLIG	Coumaranochromone
		FLIH	3-Arylcoumarin
		FLII	2-Arylbenzofuran
		FLIJ	alpha-Methoxynbenzoin
FLN	Neoflavonoid	FLNA	4-Arylcoumarin
		FLNB	4-Arylchroman
		FLNC	Dalbergiquinol
		FLND	Dalbergione
		FLNE	Neoflavene
		FLNF	Coumarinic acid

Biosynthesis

Flavonoid is synthesized through the phenylpropanoid-acetate pathway in all higher plants. It is responsible for many biological activities including pigments, anti-oxidative or anti-allergic agents, and signaling elements in nodule formation. Some of them are quite familiar in our daily life.

Familiar examples. anthocyanin (blueberry), isoflavone (soybean), rutin (soba noodle), catechin (tea), flavan-diol (tea), naringeninchalcone (tomato), polyphenol (wine, cacao)