[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=Branch1][C][=O][O][C][C][=Branch1][C][=O][N][C][C][C][O][C][=C][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][N][C][C][C][C][C][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is a specific and competitive H2 receptor antagonist. It is currently approved in South Africa under the tradename Roxit."}]