[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][N][C][C][C][=Branch2][Ring1][#Branch1][=C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][C][N][C][Ring1][O][=N][C][=C][Ring1][Branch1][C][=O][C][C][Ring2][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is a Histamine-1 Receptor Antagonist. The mechanism of action of alcaftadine is as a Histamine H1 Receptor Antagonist."}]