[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=Branch1][Ring1][=N][O][Branch1][C][Cl][Cl]"}, {"from": "gpt", "value": "The molecule is a manufactured chemical that was developed as a potential chemical warfare agent, but its use on the battlefield has never been documented. It has a disagreeable penetrating odor. Pure phosgene oxime is a colorless, crystalline solid; the munitions grade compound is a yellowish-brown liquid. Both the liquid and the solid can give off vapors at ambient temperatures."}]