[{"from": "human", "value": "Describe this molecule. [C][C][=Branch2][Ring1][C][=C][C][C][/C][=Branch1][O][=C][/C][C][/C][=Branch1][Ring2][=C][/C][=C][/C][/C][C]"}, {"from": "gpt", "value": "The molecule is a sesquiterpene that is trideca 1,3,7,11-tetraene bearing three methyl substituents at poitions 4, 8 and 12 (the 3E,7E-geoisomer). It has a role as a metabolite."}]