[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule appears as an amber liquid with an odor of old rubber. A 50% aqueous solution. Denser than water. (USCG, 1999)"}, {"from": "gpt", "value": "[C][=C][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][N][=C][Branch1][Ring2][S][Ring1][=Branch1][S-1].[Na+1]"}]