Natsudaidain 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 chemical compound. It can be isolated from

Citrus ''Citrus'' is a genus of flowering plant, flowering trees and shrubs in the rue family, Rutaceae. Plants in the genus produce citrus fruits, including important crops such as Orange (fruit), oranges, Lemon, lemons, grapefruits, pomelos, and lim ...

plants (Rutaceae). The name of the molecule comes from ''

Citrus natsudaidai or is a yellowish orange citrus hybrid fruit, a group of cultivars of ''Citrus natsudaidai'', which were discovered in 1740 in the Yamaguchi prefecture of Japan. Names ''Amanatsu'' means "sweet summer" in Japanese. In Japan, the fruit is k ...

'' (Natsumikan, lit. "summer tangerine"), a fruit of Japan developed in 1740 with a particularly tart/sour taste.

References

O-methylated flavonols Flavonoids found in Rutaceae {{Aromatic-stub