[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. An antiarrhythmic agent which exerts a potential- and frequency-dependent block of sodium channels."}, {"from": "gpt", "value": "[C][C][=C][Branch1][#Branch2][C][=Branch1][=Branch1][=C][C][=C][Ring1][=Branch1][C][N][C][=Branch1][C][=O][C][Branch1][C][C][N]"}]