[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][N][C][=Branch1][#Branch1][=C][N+1][=Branch1][C][=O][O-1][N][C][C][S][C][C][=C][S][C][=Branch1][Ring2][=N][Ring1][Branch1][C][N][Branch1][C][C][C]"}, {"from": "gpt", "value": "The molecule is a Histamine-2 Receptor Antagonist. The mechanism of action of nizatidine is as a Histamine H2 Receptor Antagonist."}]