[{"from": "human", "value": "Please give me some details about this molecule. [C][C@@H1][Branch1][#Branch1][C][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a 2-methylbutanedioic acid in which the methyl group at position 2 has S-configuration. It is a conjugate acid of a (2S)-methylsuccinate(2-). It is an enantiomer of a (R)-methylsuccinic acid."}]