[{"from": "human", "value": "Provide a brief overview of this molecule. [C][Branch1][Branch2][C][C][N][C][C][C][N][C][N]"}, {"from": "gpt", "value": "The molecule is a polyamine formed from putrescine. It is found in almost all tissues in association with nucleic acids. It is found as a cation at all pH values, and is thought to help stabilize some membranes and nucleic acid structures. It is a precursor of spermine."}]