[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a quarternary ammonium cation having one octyl and three methyl substituents around the central nitrogen."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][N+1][Branch1][C][C][Branch1][C][C][C]"}]