[{"from": "human", "value": "Could you provide a description of this molecule? [C][=Branch1][O][=C][/As][Branch1][Ring2][/C][=C][/Cl][/C][=C][/Cl][\\Cl]"}, {"from": "gpt", "value": "The molecule is a chemical weapon or chemical weapon impurity that is similar to the chemical weapon lewisite. See the chemical datasheet for lewisite for more information."}]