[{"from": "human", "value": "Provide a description of this molecule. [C][=C][C][=Branch2][Ring1][C][=C][Branch1][=C][C][=C][Ring1][=Branch1][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O][O][O]"}, {"from": "gpt", "value": "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."}]