[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a maleate ester resulting from the formal condensation of both carboxy groups of maleic acid with methanol. It is commonly used as a dienophile for Diels-Alder-type cycloaddition reactions in organic synthesis. It is a maleate ester, a diester and a methyl ester. It is functionally related to a methanol."}, {"from": "gpt", "value": "[C][O][C][=Branch1][C][=O][/C][=C][\\C][=Branch1][C][=O][O][C]"}]