[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is often administered intravenously to patients who are experiencing a hypertensive emergency."}, {"from": "gpt", "value": "[C-1][#N].[C-1][#N].[C-1][#N].[C-1][#N].[C-1][#N].[N-1][=O].[Fe+4]"}]