[{"from": "human", "value": "Provide a brief overview of this molecule. [C][N][C][C][C][C][Branch1][Branch1][C][C][Ring1][#Branch1][N][C][=Branch1][C][=O][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][Ring2][=N][Ring1][O][C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][Cl]"}, {"from": "gpt", "value": "The molecule is a Histamine-1 Receptor Antagonist. The mechanism of action of azelastine is as a Histamine H1 Receptor Antagonist."}]