[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a 2-formylglutarate(2-) that has S-configuration."}, {"from": "gpt", "value": "[C][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C@@H1][Branch1][Ring1][C][=O][C][=Branch1][C][=O][O-1]"}]