[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is the (R)-enantiomer of 2-ethylmalic acid. It is a 2-hydroxydicarboxylic acid and a dicarboxylic fatty acid. It is functionally related to a succinic acid. It is a conjugate acid of a (R)-2-ethylmalate(2-)."}, {"from": "gpt", "value": "[C][C][C@@][Branch1][#Branch1][C][C][=Branch1][C][=O][O][Branch1][=Branch1][C][=Branch1][C][=O][O][O]"}]