[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is the conjugate base of (S)-3-methyl-2-oxopentanoic acid. It has a role as a Saccharomyces cerevisiae metabolite. It is functionally related to a valerate. It is a conjugate base of a (S)-3-methyl-2-oxovaleric acid."}, {"from": "gpt", "value": "[C][C][C@H1][Branch1][C][C][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1]"}]