[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a quaternary ammonium salt found in numerous cosmetics. Its toxicity is due to its ability to act as a nitrosating agent, releasing potentially carcinogenic nitrosamines. (L1890)"}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][N+1][Branch1][C][C][Branch1][C][C][C].[Cl-1]"}]