SMILES: C1=CC(=C(C=C1C(C(=O)[O-])O)O)O
Description: The molecule is a hydroxy monocarboxylic acid anion that is the conjugate base of 3,4-dihydroxymandelic acid. It has a role as a human metabolite. It is a conjugate base of a 3,4-dihydroxymandelic acid.