[{"from": "human", "value": "Describe this molecule. [C][C][=Branch1][#Branch2][=C][C][C][O][C][=Branch1][C][=O][C][C]"}, {"from": "gpt", "value": "The molecule is an acetate ester resulting from the formal condensation of the hydroxy group of 4-methylpent-3-en-1-ol with acetic acid. It is an acetate ester and an olefinic compound. It is functionally related to a 4-methylpent-3-en-1-ol."}]