What has a structure resembling diferulic acid and is bright yellow?
Curcumin Curcumin is a bright yellow chemical produced by some plants. It is the principal curcuminoid of turmeric ("Curcuma longa"), a member of the ginger family (Zingiberaceae). It is sold as an herbal supplement, cosmetics ingredient, food flavoring, and food coloring. As a food additive, its E number is E100.
Homophthalic acid Homophthalic acid is a dicarboxylic acid with the formula CH(COH)CHCOH. It is a colorless solid. The compounds can be prepared by the Willgerodt reaction from 2-acetylbenzoic acid.