[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a dication whose structure comprises a pentane backbone linking two 1-methylpyrrolidinium groups; a nicotinic antagonist used as a ganglionic blocking agent in hypertension. It contains a pyrrolidinium ion."}, {"from": "gpt", "value": "[C][N+1][Branch1][#Branch1][C][C][C][C][Ring1][Branch1][C][C][C][C][C][N+1][Branch1][#Branch1][C][C][C][C][Ring1][Branch1][C]"}]