[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a hexacosenoate that is the conjugate base of (9Z)-hexacosenoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][/C][=C][\\C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1]"}]