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Natsudaidain structure
CAS number 35154-55-3 YesY
PubChem 3084605
ChemSpider 2341642
Jmol-3D images Image 1
Molecular formula C21H22O9
Molar mass 418.39 g/mol
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Natsudaidain is an O-methylated flavonol, a type of chemical compound. It can be isolated from Citrus plants[1] (Rutaceae). The name of the molecule comes from Citrus natsudaidai (Natsumikan, lit. "summer tangerine"), a fruit of Japan developed in 1740 with a particularly tart/sour taste.


  1. ^ Matsui, T.; Ito, C.; Itoigawa, M.; Okada, T.; Furukawa, H. (2009). "Effect of natsudaidain isolated from Citrus plants on TNF-α and cyclooxygenase-2 expression in RBL-2H3 cells". Journal of Pharmacy and Pharmacology 61 (1): 109–114. doi:10.1211/jpp/61.01.0015. PMID 19126304.  edit