[{"from": "human", "value": "Please give me some details about this molecule. [C][N][C][=Branch1][Ring1][=N][C][N][C][C][=C][C][=C][C][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "A guanidinium antihypertensive agent that acts by blocking adrenergic transmission."}]