[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is conjugate acid of 4-guanidinobutanal; major species at pH 7.3. It is a conjugate acid of a 4-guanidinobutanal."}, {"from": "gpt", "value": "[C][Branch1][Ring2][C][C][=O][C][NH1+1][=C][Branch1][C][N][N]"}]