[{"from": "human", "value": "Describe this molecule. [C][Branch1][Ring2][C][C][NH3+1][C][NH3+1]"}, {"from": "gpt", "value": "The molecule is an alkane-alpha,omega-diammonium(2+) that is the dication of putrescine (1,4-butanediamine) arising from protonation of both primary amino groups; major species at pH 7.3. It has a role as a human metabolite and a fundamental metabolite. It is a conjugate acid of a putrescine."}]