[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is found in allspice. 7-Methyl-3-methylene-1,6-octadiene is found in many essential oils, e.g. hop oil. 7-Methyl-3-methylene-1,6-octadiene is a flavouring agent."}, {"from": "gpt", "value": "[C][C][=Branch1][#Branch2][=C][C][C][C][=Branch1][C][=C][C][=C][C]"}]