[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a secondary aliphatic ammonium ion obtained by protonation of both amino groups of piperazine. It is a conjugate acid of a piperazine."}, {"from": "gpt", "value": "[C][C][NH2+1][C][C][NH2+1][Ring1][=Branch1]"}]