Ethyl [(2-hydroxy­phen­yl)(pyridinium-2-ylamino)meth­yl]phospho­nate methanol solvate

In the title compound, C(14)H(17)N(2)O(4)P·CH(3)OH, the planes of the pyridinium-2-ylamino and 2-hydroxy­phenyl groups form a dihedral angle of 75.6 (1)°, with the pyridinium NH group and the 2-hydroxy­phenyl OH group pointing in opposite directions. Three intra­molecular hydrogen bonds are observed. Two phospho­nate and two methanol mol­ecules are connected by O—H⋯O hydrogen bonds as a centrosymmetric dimeric cluster, and inter­act further with other dimeric clusters via N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds and C—H⋯π inter­actions, resulting in a sheet structure.