[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule appears as a clear colorless liquid with a \"fishlike\" odor. Denser than water. Flash point 199 \u00b0F. Contact may irritate skin, eyes and mucous membranes. May be toxic by ingestion."}, {"from": "gpt", "value": "[C][N][C][C][C][C][Ring1][Branch1][=O]"}]