[{"from": "human", "value": "Please give me some details about this molecule. [C][Branch1][Ring1][C][NH3+1][C][P][=Branch1][C][=O][Branch1][C][O][O-1]"}, {"from": "gpt", "value": "The molecule is a zwitterion resulting from the transfer of a proton from the phosphonic acid group to the amino group of (3-aminopropyl)phosphonic acid; the major species at pH 7.3. It is functionally related to a phosphonate(2-). It is a tautomer of a (3-aminopropyl)phosphonic acid."}]