[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][C][Cl]"}, {"from": "gpt", "value": "The molecule is commonly known as a tear gas, a peripheral sensory irritant. It is also used as an intermediate to produce organic substances especially drugs."}]