[{"from": "human", "value": "Describe this molecule. [C][C][Branch1][C][C][C][=C][Branch2][Ring1][S][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][C][C@@H1][C@@][Ring1][#Branch1][Branch1][O][C][C][C][C][Ring1][=Branch1][Branch1][C][C][C][C][=Branch1][C][=O][O-1][O]"}, {"from": "gpt", "value": "The molecule is a monocarboxylic acid anion that is the conjugate base of (+)-pisiferic acid, arising from the deprotonation of the carboxy group. Major species at pH 7.3. It is a conjugate base of a (+)-pisiferic acid."}]