[{"from": "human", "value": "Please give me some details about this molecule. [C][C][C][N][C][C][Branch2][Ring1][=Branch2][C][O][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][C][C][C][=C][C][=C][C][=C][Ring1][=Branch1][O].[Cl]"}, {"from": "gpt", "value": "The molecule is the hydrochloride salt form of propafenone with class 1C antiarrhythmic effects. Propafenone hydrochloride stabilizes the neuronal membrane by binding to and inhibiting voltage-gated sodium channels, thereby reducing sodium influx required for the initiation and conduction of impulses in Purkinje and myocardial cells. This agent produces a marked depression of phase 0 and prolonged effective refractory period in the atrio-ventricular nodal and His-Purkinje tissue, resulting in a profound decrease in excitability, conduction velocity and automaticity, thereby counteracting atrial and ventricular arrythmias."}]