[{"from": "human", "value": "What can you tell me about this molecule? [C][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is the conjugate base of propionic acid; a key precursor in lipid biosynthesis. It has a role as a human metabolite. It is a conjugate base of a propionic acid."}]