[{"from": "human", "value": "Please give me some details about this molecule. [C][C][Branch2][Ring1][=Branch1][C][N][C][=C][C][=C][C][=C][Ring1][=Branch1][S][C][=C][C][=C][C][=C][Ring1][=Branch1][Ring1][=C][N][Branch1][C][C][C]"}, {"from": "gpt", "value": "The molecule is first generation antihistamine that belongs to the phenothiazine class and is used predominantly as an antiemetic to treat nausea and vomiting and prevent motion sickness. Despite its phenothiazine structure, promethazine has not been linked to instances of clinically apparent acute liver injury."}]