[{"from": "human", "value": "What can you tell me about this molecule? [C][C][C][C][C][=N][C][Branch1][#Branch1][C][C][C][C][Ring1][Branch1][C][=Branch1][C][=O][N][Ring1][#Branch2][C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=N][N][N][=N][Ring1][Branch1]"}, {"from": "gpt", "value": "The molecule is a nonpeptide angiotensin II antagonist with antihypertensive activity. Irbesartan selectively and competitively blocks the binding of angiotensin II to the angiotensin I receptor. Angiotensin II stimulates aldosterone synthesis and secretion by adrenal cortex, which decreases the excretion of sodium and increases the excretion of potassium. Angiotensin II also acts as a vasoconstrictor in vascular smooth muscle. (NCI05)"}]