Azalein

Azalein
Names
	IUPAC name 2-(3,4-dihydroxyphenyl)-7-hydroxy-5-methoxy-3-[(2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxychromen-4-one
	Other names Azaleatin 3-O-α-L-rhamnoside
Identifiers
CAS Number	29028-02-2 ;
3D model (JSmol)	Interactive image;
ChemSpider	26286942 ;
PubChem CID	5321320;
CompTox Dashboard (EPA)	DTXSID50487206 ;
	InChI InChI=1S/C22H22O11/c1-8-16(26)18(28)19(29)22(31-8)33-21-17(27)15-13(30-2)6-10(23)7-14(15)32-20(21)9-3-4-11(24)12(25)5-9/h3-8,16,18-19,22-26,28-29H,1-2H3/t8-,16-,18+,19+,22-/m0/s1 Key: FYSMTINDJSASRR-UFGFRKJLSA-N ; InChI=1/C22H22O11/c1-8-16(26)18(28)19(29)22(31-8)33-21-17(27)15-13(30-2)6-10(23)7-14(15)32-20(21)9-3-4-11(24)12(25)5-9/h3-8,16,18-19,22-26,28-29H,1-2H3/t8-,16-,18+,19+,22-/m0/s1 Key: FYSMTINDJSASRR-UFGFRKJLBS;
	SMILES CC1C(C(C(C(O1)OC2=C(OC3=CC(=CC(=C3C2=O)OC)O)C4=CC(=C(C=C4)O)O)O)O)O;
Properties
Chemical formula	C22H22O11
Molar mass	462.40 g/mol
Density	1.683 g/mL
Melting point	181 to 185 °C (358 to 365 °F; 454 to 458 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Azalein is a chemical compound. It is a flavonol, a type of flavonoid. It is the 3-O-α-L-rhamnoside of azaleatin. It can be found in the flowers of Plumbago and Rhododendron species.[1]

References

Harborne, JB (January 1962). "Plant polyphenols. 5. Occurrence of azalein and related pigments in flowers of Plumbago and Rhododendron species". Arch. Biochem. Biophys. 96: 171–8. doi:10.1016/0003-9861(62)90467-8. PMID 13904580.

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