Azaleatin is a chemical compound. It is an

O-methylated flavonol The O-methylated flavonoids or methoxyflavonoids are flavonoids with methylations on hydroxyl groups ( methoxy bonds). O-methylation has an effect on the solubility of flavonoids. Enzymes O-methylated flavonoids formation implies the presence of sp ...

, a type of flavonoid. It was first isolated from the flowers of ''

Rhododendron mucronatum ''Rhododendron mucronatum'' is a rhododendron species native to China, where it grows at altitudes of . This evergreen shrub grows to in height, with leaves that are lanceolate The following is a list of terms which are used to describe leaf ...

'' in 1956 and has since been recorded in forty-four other Rhododendron species, in ''

Plumbago capensis ''Plumbago auriculata'', the cape leadwort, blue plumbago or Cape plumbago, is a species of flowering plant in the family Plumbaginaceae, native to South Africa."Botanica. The Illustrated AZ of over 10000 garden plants and how to cultivate them" ...

'', in ''

Ceratostigma willmottiana ''Ceratostigma'' (;), or leadwort, plumbago, is a genus of eight species of flowering plants in the family Plumbaginaceae, native to warm temperate to tropical regions of Africa and Asia. Common names are shared with the genus ''Plumbago''. De ...

'' and in ''

Carya pecan The pecan (''Carya illinoinensis'') is a species of hickory native to the southern United States and northern Mexico in the region of the Mississippi River. The tree is cultivated for its seed in the southern United States, primarily in Georgia ...

''. It has been also been found in the leaves of ''

Eucryphia ''Eucryphia'' is a small genus of trees and large shrubs native to the south temperate regions of South America and coastal eastern Australia, mainly Tasmania. Sometimes placed in a family of their own, the Eucryphiaceae, more recent classificati ...

''.

Glycosides

Azalein 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 ''Plumbago'' is a genus of 10–20 species of flowering plants in the family Plumba ...

is the 3-''O''-α-L-

rhamnoside Rhamnose (Rha, Rham) is a naturally occurring deoxy sugar. It can be classified as either a methyl-pentose or a 6-deoxy-hexose. Rhamnose predominantly occurs in nature in its L-form, L-form as L-rhamnose (6-deoxy-L-mannose). This is unusual, since ...

of azaleatin.

References

O-methylated flavonols Catechols {{Aromatic-stub