[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=C][C][=Branch1][C][=O][C@@H1][Branch1][Branch2][C][Ring1][=Branch1][Branch1][C][C][C][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a 4-oxo monocarboxylic acid anion that is the conjugate base of [(R)-2,2,3-trimethyl-5-oxocyclopent-3-enyl]acetic acid, arising from deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a [(R)-2,2,3-trimethyl-5-oxocyclopent-3-en-1-yl]acetic acid."}]