Bis(4-hydroxyphenyl)acetic Acid is a bis-phenolic derivative formed from O-demethylation and dechlorination of an insecticide, methoxychlor. Also, it is derived from Glyoxylic Acid (G754995), which is used as a reagent in the synthesis of N-{[6-chloro-4-(2,6-dimethoxyphenyl)quinazolin-2-yl]carbonyl}-L-leucine, a novel nonpeptide chemotype selective for neurotensin receptor 2. Also, used as a reagent in the synthesis of elemonic acid derivatives as Pin 1 inhibitors.