[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a 2-methyl-3-oxosuccinic acid. It is an enantiomer of a (S)-2-methyl-3-oxosuccinic acid."}, {"from": "gpt", "value": "[C][C@H1][Branch1][#Branch2][C][=Branch1][C][=O][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O]"}]