Quercetin

Quercetin
Names
Pronunciation	/ˈkwɜːrsɪtɪn/
	IUPAC name 3,3′,4′,5,7-Pentahydroxyflavone
	Systematic IUPAC name 2-(3,4-Dihydroxyphenyl)-3,5,7-trihydroxy-4H-1-benzopyran-4-one
	Other names 5,7,3′,4′-flavon-3-ol, Sophoretin, Meletin, Quercetine, Xanthaurine, Quercetol, Quercitin, Quertine, Flavin meletin
Identifiers
CAS Number	117-39-5 ; 6151-25-3 (dihydrate) ;
3D model (JSmol)	Interactive image;
Beilstein Reference	317313
ChEBI	CHEBI:16243 ;
ChEMBL	ChEMBL50 ;
ChemSpider	4444051 ;
DrugBank	DB04216 ;
ECHA InfoCard	100.003.807
EC Number	204-187-1;
Gmelin Reference	579210
IUPHAR/BPS	5346;
KEGG	C00389 ;
PubChem CID	5280343;
UNII	9IKM0I5T1E ; 53B03V78A6 (dihydrate) ;
UN number	2811
CompTox Dashboard (EPA)	DTXSID4021218 ;
	InChI InChI=1S/C15H10O7/c16-7-4-10(19)12-11(5-7)22-15(14(21)13(12)20)6-1-2-8(17)9(18)3-6/h1-5,16-19,21H Key: REFJWTPEDVJJIY-UHFFFAOYSA-N ; InChI=1/C15H10O7/c16-7-4-10(19)12-11(5-7)22-15(14(21)13(12)20)6-1-2-8(17)9(18)3-6/h1-5,16-19,21H Key: REFJWTPEDVJJIY-UHFFFAOYAW;
	SMILES O=C1c3c(O/C(=C1/O)c2ccc(O)c(O)c2)cc(O)cc3O;
Properties
Chemical formula	C15H10O7
Molar mass	302.236 g/mol
Appearance	yellow crystalline powder
Density	1.799 g/cm3
Melting point	316 °C (601 °F; 589 K)
Solubility in water	Practically insoluble in water; soluble in aqueous alkaline solutions
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Quercetin is a plant flavonol from the flavonoid group of polyphenols. It is found in many fruits, vegetables, leaves, seeds, and grains; capers, red onions, and kale are common foods containing appreciable amounts of it. It has a bitter flavor and is used as an ingredient in dietary supplements, beverages, and foods.