[{"from": "human", "value": "Could you provide a description of this molecule? [C][=O].[C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][=C][=O]"}, {"from": "gpt", "value": "The molecule is a dark-brown liquid with a weak odor. Sinks in water. (USCG, 1999)"}]