[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an unsaturated fatty acid anion that is the conjugate base of geranic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a geranic acid."}, {"from": "gpt", "value": "[C][C][=Branch1][=C][=C][C][C][/C][=Branch1][#Branch1][=C][/C][=Branch1][C][=O][O-1][/C][C]"}]