[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][O][C][=Branch1][C][=O][C@H1][Branch1][O][C][C][C][=C][C][=C][C][=C][Ring1][=Branch1][N][C@H1][C][C][C][N][C][C][C][C@H1][Branch1][Branch2][N][Ring1][=Branch1][C][Ring1][O][=O][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is the anhydrous form of the pyridazine angiotensin-converting enzyme (ACE) inhibitor cilazapril with antihypertensive activity. As a prodrug cilazapril is rapidly metabolized in the liver to cilazaprilat; cilazaprilat competitively binds to and inhibits ACE, thereby blocking the conversion of angiotensin I to angiotensin II. This prevents the potent vasoconstrictive actions of angiotensin II, resulting in vasodilation. Cilazaprilat also decreases angiotensin II-induced aldosterone secretion by the adrenal cortex, which leads to an increase in sodium excretion and subsequently increases water outflow."}]