[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule appears as white powder or crystals. Melting point 134.5 \u00b0C. Slightly acidic and astringent taste with a faint odor."}, {"from": "gpt", "value": "[C][/C][=C][/C][=C][/C][=Branch1][C][=O][O]"}]