SMILES: C(C[NH3+])CP(=O)(O)[O-]
Description: 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 derives from a phosphonate(2-). It is a tautomer of a (3-aminopropyl)phosphonic acid.