2-((3,5-Bis(1,1-dimethylethyl)-4-hydroxyphenyl)methylene)-4-hydroxybutanoic acid 83677-17-2 Butanoic acid, 2-((3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl)methylene)-4-hydroxy- beta-Carboxy-beta-(2-hydroxyethyl)-3,5-di-tert-butyl-4-hydroxystyrene