[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an Antihistamine. The mechanism of action of hydroxyzine is as a Histamine Receptor Antagonist."}, {"from": "gpt", "value": "[C][C][N][Branch1][N][C][C][N][Ring1][=Branch1][C][C][O][C][C][O][C][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][Cl]"}]