Homoprotocatechuic acid, Catechol-4-acetic Acid, Benzeneacetic acid, 3,4-dihydroxy-, Dopacetic acid, Dopac, 4-Carboxymethylcatechol, 4-Carboxymethylpyrocatechol, Pyrocatechol-4-acetic Acid, Homoprotocatechuate, Benzeneacetic acid,3,4-dihydroxy, 3,4-dihydroxy-1-benzeneacetic acid, 3,4-Dihydroxyphenylacetic acid, Dihydroxyphenylacetic acid