[{"from": "human", "value": "Describe this molecule. [C][C][C][C][=N][C][=Branch2][Ring2][#Branch1][=C][Branch2][Ring1][=C][N][Ring1][Branch1][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][C][=Branch1][C][=O][O][C][Branch1][C][C][Branch1][C][C][O]"}, {"from": "gpt", "value": "The molecule is a synthetic imidazole derivative and angiotensin II receptor antagonist with antihypertensive activity. Olmesartan selectively binds to the angiotensin type 1 (AT1) receptor subtype in vascular smooth muscle and adrenal gland, thereby competing with angiotensin II for binding to the AT1 receptor. This prevents angiotensin II-induced vasoconstriction and interferes with angiotensin II-mediated aldosterone secretion, thereby decreasing aldosterone production and preventing aldosterone-stimulated sodium retention and potassium excretion."}]