[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is the anion of (R)-2-hydroxy-4-methylpentanoic acid. It has a role as a human metabolite. It is a hydroxy monocarboxylic acid anion and a 2-hydroxy-4-methylvalerate. It is functionally related to a valerate. It is a conjugate base of a (R)-2-hydroxy-4-methylpentanoic acid."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O]"}]