[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. Histamine H1 antagonist used in treatment of allergies, rhinitis, and urticaria. "}, {"from": "gpt", "value": "[C][N][Branch1][C][C][C][C][C][Branch1][N][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][Br][C][=C][C][=C][C][=N][Ring1][=Branch1]"}]