[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is an organic salt or ester of maleic acid that could be conjugated to free base compounds/drugs to improve the physiochemical properties including stability, solubility and dissolution rate. (NCI)"}, {"from": "gpt", "value": "[C][=Branch1][#Branch1][=C][\\C][=Branch1][C][=O][O][\\C][=Branch1][C][=O][O]"}]