[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is the N-(4-aminobutyl) derivative of 3-aminopropanal. It is a primary aliphatic amine, a secondary aliphatic amine and an alpha-CH2-containing aldehyde. It is a conjugate acid of a (4-ammoniobutyl)(3-oxopropyl)azanium."}, {"from": "gpt", "value": "[C][Branch1][Branch2][C][C][N][C][C][C][=O][C][N]"}]