quercitin

Quercetin is a yellow crystalline pigment with the chemical formula C₁₅H₁₀O₇. It is typically found in plants as glycosides, meaning it is combined with sugar molecules. Quercetin belongs to a class of compounds called flavonoids, which are common in plants and often responsible for yellow colors, particularly in flower petals.12

First isolated from oak trees, quercetin is widely distributed in nature. It is a weak acid and can form orange salts when combined with strong acids. Quercetin is also a strong dyestuff, capable of producing various colors depending on the mordant used. While primarily found in plants, a pigment with similar chemical properties has been identified in the wings of a butterfly.2