[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a monocarboxylic acid anion that is the conjugate base of 17-(4-hydroxyphenyl)heptadecanoic acid; major species at pH 7.3. It is a conjugate base of a 17-(4-hydroxyphenyl)heptadecanoic acid."}, {"from": "gpt", "value": "[C][=C][C][=Branch2][Ring1][O][=C][C][=C][Ring1][=Branch1][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1][O]"}]