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