Luteolin (CAS: 491-70-3) is a naturally occurring flavonoid compound . Widely found in sophora flower bud, chrysanthemums, celery, olive leaves, and other plants, it serves as a crucial secondary metabolite for plant defense against UV radiation and pathogens. Its unique flavone backbone and polyhydroxy substitution pattern confer significant antioxidant, anti-inflammatory, and antitumor activities. It is listed as a food additive (E586) by the EU and included in pharmacopoeias of China, the US, and other countries.

Product Name: Luteolin 

IUPAC Name: 2-(3,4-Dihydroxyphenyl)-5,7-dihydroxy-4H-chromen-4-one

CAS No.​: 491-70-3

Molecular Formula: C₁₅H₁₀O₅