[{"from": "human", "value": "Provide a brief overview of this molecule. [C][Branch1][#Branch1][C][C][=Branch1][C][=O][O][C][S]"}, {"from": "gpt", "value": "The molecule is a monocarboxylic acid that is butyric acid in which one of the hydrogens at position 4 has been replaced by a thiol group. It is a thiol and a monocarboxylic acid. It is a conjugate acid of a 4-sulfanylbutanoate."}]