[{"from": "human", "value": "What can you tell me about this molecule? [C][C][N][Branch1][#C][C][C][N][Ring1][=Branch1][C][C][O][C][C][=Branch1][C][=O][O][C@H1][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][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 levocetirizine is as a Histamine H1 Receptor Antagonist."}]