[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a Histamine-2 Receptor Antagonist. The mechanism of action of ranitidine is as a Histamine H2 Receptor Antagonist."}, {"from": "gpt", "value": "[C][N][C][=Branch1][#Branch1][=C][N+1][=Branch1][C][=O][O-1][N][C][C][S][C][C][=C][C][=C][Branch1][Ring2][O][Ring1][Branch1][C][N][Branch1][C][C][C]"}]