Ayanin is a O-methylated flavonol, a type of flavonoid. It is the 3,7,4'-tri-O-methylation of quercetin

Quercetin

Quercetin , a flavonol, is a plant-derived flavonoid found in fruits, vegetables, leaves and grains. It also may be used as an ingredient in supplements, beverages or foods.-Occurrence:...

.

It can be found in Croton schiedeanus

Croton schiedeanus

Croton schiedeanus is a plant species native from Mexico to tropical South America.C schiedeanus is known to contain the flavonol ayanin and cis-clerodane diterpenoids ....

. It can also be synthetized.

Biosynthetis

The enzyme 3,7-dimethylquercetin 4'-O-methyltransferase

3,7-dimethylquercetin 4'-O-methyltransferase

In enzymology, a 3,7-dimethylquercetin 4'-O-methyltransferase is an enzyme that catalyzes the chemical reactionThus, the two substrates of this enzyme are S-adenosyl methionine and 5,3',4'-trihydroxy-3,7-dimethoxyflavone , whereas its two products are S-adenosylhomocysteine and...

 uses S-adenosyl methionine

S-Adenosyl methionine

S-Adenosyl methionine is a common cosubstrate involved in methyl group transfers. SAM was first discovered in Italy by G. L. Cantoni in 1952. It is made from adenosine triphosphate and methionine by methionine adenosyltransferase . Transmethylation, transsulfuration, and aminopropylation are the...

 and 5,3',4'-trihydroxy-3,7-dimethoxyflavone (rhamnazin) to produce S-adenosylhomocysteine and 5,3'-dihydroxy-3,7,4'-trimethoxyflavone (ayanin).