[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a nitroguanidine and a one-carbon compound. It is a tautomer of a 2-nitroguanidine."}, {"from": "gpt", "value": "[C][=Branch1][C][=N][Branch1][C][N][N][N+1][=Branch1][C][=O][O-1]"}]