[{"from": "human", "value": "Provide a description of this molecule. [C][C][=Branch1][P][=C][C][C][/C][=Branch1][#Branch2][=C][/C][C][C][=Branch1][C][=C][C][=C][/C][C]"}, {"from": "gpt", "value": "The molecule is a beta-farnesene in which the double bond at position 6-7 has E configuration. It is the major or sole alarm pheromone in most species of aphid. It has a role as an alarm pheromone and a metabolite."}]