[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule appears as a liquid. May be toxic by ingestion. Irritates skin and eyes. Vapors are heavier than air. May emit highly toxic nitrogen oxide fumes when heated to decomposition. Used to make other chemicals."}, {"from": "gpt", "value": "[C][Si][Branch1][C][C][Branch1][C][C][N][Si][Branch1][C][C][Branch1][C][C][C]"}]