[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a nitroguanidine and a one-carbon compound. It is a tautomer of a 1-nitroguanidine."}, {"from": "gpt", "value": "[C][=Branch1][#Branch1][=N][N+1][=Branch1][C][=O][O-1][Branch1][C][N][N]"}]