Azaleatin Explained

Azaleatin is a chemical compound. It is an O-methylated flavonol, a type of flavonoid. It was first isolated from the flowers of Rhododendron mucronatum in 1956^[1] and has since been recorded in 44 other Rhododendron species, in Plumbago capensis, in Ceratostigma willmottiana^[2] and in Carya pecan.^[3] It has also been found in the leaves of Eucryphia.^[4]

Glycosides

Azalein is the 3-O-α-L-rhamnoside of azaleatin.

Notes and References

1. 10.1021/ja01599a052 . 1956 . Wada . Einosuke . Journal of the American Chemical Society . 78 . 18 . 4725–6 . On a Flavonol Glycoside Isolated from Flowers of a White Azalea (Rhododendron mucronatum G. Don).
2. 10.1016/0003-9861(62)90467-8 . Plant polyphenols: 5. Occurrence of azalein and related pigments in flowers of Plumbago and Rhododendro species . 1962 . Harborne . J.B. . Jeffrey Harborne . Archives of Biochemistry and Biophysics . 96 . 171–8 . 13904580.
3. 14085492 . 1963 . Sasaki . T . Mikami . M . Studies on the Components of Pecan (Carya Pecan Engl. & Graebn). I. On the Flavon Isolated from the Bark of Pecan . 83 . 897–900 . Yakugaku Zasshi. 10.1248/yakushi1947.83.9_897 . free .
4. 10.1038/2121065a0 . Occurrence of Azaleatin and Caryatin in Eucryphia . 1966 . Bate-Smith . E. C. . Edgar Charles Bate-Smith . Harborne . J. B. . Jeffrey Harborne . Davenport . S. M. . Nature . 212 . 5066 . 1065–6. 4258930 .