[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][C][C][C][=N][C][=Branch2][Ring2][Ring2][=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][O][Cl]"}, {"from": "gpt", "value": "The molecule is an Angiotensin 2 Receptor Blocker. The mechanism of action of losartan is as an Angiotensin 2 Receptor Antagonist."}]