[{"from": "human", "value": "Provide a brief overview of this molecule. [C][O][C][=C][Branch1][#C][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][C][=Branch1][C][=O][O-1][O]"}, {"from": "gpt", "value": "The molecule is a hydroxy monocarboxylic acid anion which is obtained by deprotonation of the carboxy group of homovanillic acid. It has a role as a human metabolite and a mouse metabolite. It is a conjugate base of a homovanillic acid."}]