[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a yellow-brown paste with a weak odor of ammonia. Sinks and mixes with water. (USCG, 1999)"}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][/C][=C][\\C][C][C][C][C][C][C][C][=Branch1][C][=O][O].[N]"}]