The title molecule, C15H20NO5P, has a zwitterionic structure with stro
ng intermolecular N ... O and O ... O hydrogen bonds. The coordination
around phosphorus is distorted tetrahedral, with a maximum bond-angle
deviation of 12 degrees from the ideal. The P--C bond length is 1.860
(4) Angstrom and the average P-O value is 1.518 (3) Angstrom.