[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a Histamine-2 Receptor Antagonist. The mechanism of action of nizatidine 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][S][C][=Branch1][Ring2][=N][Ring1][Branch1][C][N][Branch1][C][C][C]"}]