[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a hydroxy monocarboxylic acid anion that is the conjugate base of 3-hydroxy-3-methylhexanoic acid, arising from deprotonation of the carboxy group. It is a hydroxy monocarboxylic acid anion and a 3-methyl fatty acid anion. It is functionally related to a hexanoate. It is a conjugate base of a 3-hydroxy-3-methylhexanoic acid."}, {"from": "gpt", "value": "[C][C][C][C][Branch1][C][C][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][O]"}]