[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=Branch1][Ring2][=C][C][=O][C]"}, {"from": "gpt", "value": "The molecule is an enal consisting of but-2-ene with a methyl substituent at position 3 and an oxo group at position 1. It has a role as a metabolite. It is functionally related to a 3-methylbut-2-enoic acid."}]