[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a 2-hydroxycarboxylate that is obtained by removal of a proton from the carboxylic acid group of 4-hydroxymandelic acid. It is a 2-hydroxy carboxylate and a member of phenols. It is functionally related to a mandelate. It is a conjugate base of a 4-hydroxymandelic acid."}, {"from": "gpt", "value": "[C][=C][C][=Branch1][#C][=C][C][=C][Ring1][=Branch1][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O][O]"}]