[{"from": "human", "value": "Describe this molecule. [C][C][=N][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][Ring1][#Branch2]"}, {"from": "gpt", "value": "The molecule appears as a colorless oily liquid darkening to red-brown on exposure to air. Flash point 175 \u00b0F. Denser than water and slightly soluble in water. Vapors heavier than air. Produces toxic oxides of nitrogen during combustion. Used to make dyes, pharmaceuticals and other chemicals."}]