[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a hydroxy monocarboxylic acid anion that is the conjugate base of 3-hydroxyisovaleric acid. It has a role as a human metabolite. It is a conjugate base of a 3-hydroxyisovaleric acid."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][O]"}]